477 lines
52 KiB
XML
477 lines
52 KiB
XML
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<mods:title id="958CC3161A8E2B75A1336E1CB55D8BBB">Deux nouvelles espèces d’euphorbes (Euphorbia L. section Goniostema, Euphorbiaceae) de la région de Fort-Dauphin, Madagascar</mods:title>
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<mods:namePart id="6D8E83FB8896A96F8357B9E6DF7A5B16">Castillon, Jean-Philippe</mods:namePart>
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<mods:title id="AAD5A371B77A5A3D83B4432EBE3940BD">Adansonia</mods:title>
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<mods:date id="5FA741684EBB0BE0F730A18FB20E8112">2018</mods:date>
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<mods:number id="11FC21252DF1146DA629CE85E6DA91F0">2018-10-22</mods:number>
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<taxonomicName id="2EE75D916761D02BFF6BFC47FE303F3F" ID-CoL="8Y3PV" authorityName="J.-P.Castillon" authorityYear="2018" box="[218,431,1012,1039]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="3" pageNumber="164" phylum="Tracheophyta" rank="species" species="gigantea">
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<emphasis id="DB93FA006761D02BFF6BFC47FE303F3F" bold="true" box="[218,431,1012,1039]" italics="true" pageId="3" pageNumber="164">Euphorbia gigantea</emphasis>
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J.-P. Castillon,
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<taxonomicNameLabel id="C0A0477B6761D02BFDECFC46FD2D3F3E" box="[605,690,1013,1039]" pageId="3" pageNumber="164" rank="species">sp. nov.</taxonomicNameLabel>
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(
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<figureCitation id="71DC3A976761D02BFE24FBA7FE473F1F" box="[405,472,1044,1070]" captionStart="FIG" captionStartId="4.[132,143,1985,2003]" captionTargetBox="[202,1386,215,1954]" captionTargetId="figure-31@4.[748,1297,763,1314]" captionTargetPageId="4" captionText="FIG. 1. — Euphorbia giganteaJ.-P.Castillon,sp.nov.: A, B, port général; C, tige feuillue; D, extrémité des tiges portant de nombreuses incyathescences; E, cyathe en gros plan." figureDoi="http://doi.org/10.5281/zenodo.4602026" httpUri="https://zenodo.org/record/4602026/files/figure.png" pageId="3" pageNumber="164">Figs 1</figureCitation>
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;
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<figureCitation id="71DC3A976761D02BFE57FBA7FE6B3F1F" box="[486,500,1044,1070]" captionStart="FIG" captionStartId="6.[360,371,2007,2025]" captionTargetBox="[235,1352,215,1954]" captionTargetId="figure-22@6.[235,1352,215,1954]" captionTargetPageId="6" captionText="FIG. 2. — Paratype de Euphorbia gigantea J.-P. Castillon, sp. nov., échantillon Decary 9432 (P00217865)." figureDoi="http://doi.org/10.5281/zenodo.4602028" httpUri="https://zenodo.org/record/4602028/files/figure.png" pageId="3" pageNumber="164">2</figureCitation>
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)
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</paragraph>
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<emphasis id="DB93FA006761D02BFF35FBFDFF683F54" box="[132,247,1101,1125]" italics="true" pageId="3" pageNumber="164">Haec planta</emphasis>
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<taxonomicName id="2EE75D916761D02BFF4FFBFDFEF63F54" authorityName="Leandri" authorityYear="1946" box="[254,361,1101,1125]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="3" pageNumber="164" phylum="Tracheophyta" rank="species" species="croizatii">E. croizatii</taxonomicName>
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<emphasis id="DB93FA006761D02BFEDEFBFEFDAF3F54" box="[367,560,1101,1125]" italics="true" pageId="3" pageNumber="164">affinis est sed: primo</emphasis>
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,
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<emphasis id="DB93FA006761D02BFD8CFBFEFE9C3FAB" italics="true" pageId="3" pageNumber="164">
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habitu majore (caulibus ascendentibus usque
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altis, contra
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); secundo, foliis majoribus 45
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</emphasis>
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×
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contra 8-10
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×
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; tertio, spinis paene aequalibus singulisque contra spinis in circulo dispositis (3-5 minoribus circum unam proceram), praesertim differt.
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</emphasis>
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. —
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.
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, bush à
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, environ
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,
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,
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,
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<emphasis id="DB93FA006761D02BFE7AFAB1FE673E28" box="[459,504,1282,1305]" italics="true" pageId="3" pageNumber="164">J.-B.</emphasis>
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<materialsCitation id="598F2C4F6761D02BFE4CFAB2FD743E52" collectingDate="1988-12-07" collectionCode="TAN" country="Madagascar" county="Hazofotsy" latitude="-24.833334" location="Castillon" longLatPrecision="1249" longitude="46.533333" municipality="Andohahelo" pageId="3" pageNumber="164" specimenCount="1" typeStatus="holotype">
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64
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(holo-,
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). AUTRES SPÉCIMENS. —
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.
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,
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:
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,
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,
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,
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<collectingDate id="8D1DF93A6761D02BFD8DFAF8FD323E52" box="[572,685,1355,1379]" pageId="3" pageNumber="164" value="1988-12-07">7.XII.1988</collectingDate>
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</date>
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,
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<emphasis id="DB93FA006761D02BFD0DFAFFFD743E52" box="[700,747,1356,1379]" italics="true" pageId="3" pageNumber="164">Peter</emphasis>
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</materialsCitation>
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<emphasis id="DB93FA006761D02BFD42FAFFFC963E52" box="[755,777,1356,1379]" italics="true" pageId="3" pageNumber="164">B.</emphasis>
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<materialsCitation id="598F2C4F6761D02BFF37FAD5FD023E4F" box="[134,669,1382,1406]" collectingDate="1991-11-27" collectionCode="P, MO" country="Madagascar" pageId="3" pageNumber="164" specimenCode="P00220813" specimenCount="1" typeStatus="holotype">
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<emphasis id="DB93FA006761D02BFF37FAD5FE813E4F" box="[134,286,1382,1406]" italics="true" pageId="3" pageNumber="164">Phillipson 2827</emphasis>
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(
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<collectionCode id="8FF6BED76761D02BFE9AFAD5FEA53E4F" box="[299,314,1382,1406]" country="France" lsid="urn:lsid:biocol.org:col:15763" name="Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants" pageId="3" pageNumber="164" type="Herbarium">P</collectionCode>
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[
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<specimenCode id="B9418E696761D02BFEF1FAD5FE253E4F" box="[320,442,1382,1406]" collectionCode="P" country="France" lsid="urn:lsid:biocol.org:col:15763" name="Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants" pageId="3" pageNumber="164" type="Herbarium">P00220813</specimenCode>
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]!;
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) et
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,
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<emphasis id="DB93FA006761D02BFD1AFAD5FD4D3E4C" box="[683,722,1382,1405]" italics="true" pageId="3" pageNumber="164">S.T.</emphasis>
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<materialsCitation id="598F2C4F6761D02BFD68FAD5FEF83E83" collectingDate="1931-11-26" collectionCode="TAN, P" country="Madagascar" location="Moyenne Mananara" pageId="3" pageNumber="164" specimenCode="P00217865" specimenCount="1" typeStatus="holotype">
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<emphasis id="DB93FA006761D02BFD68FAD5FE9C3EA9" italics="true" pageId="3" pageNumber="164">Malcomber 1091</emphasis>
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(
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!);
|
||
<location id="EC3870C96761D02BFED4FA32FDAD3EA9" LSID="urn:lsid:plazi:treatment:614E97046761D02DFF6BFC47FADE3901:EC3870C96761D02BFED4FA32FDAD3EA9" box="[357,562,1409,1433]" country="Madagascar" name="Moyenne Mananara" pageId="3" pageNumber="164">Moyenne Mananara</location>
|
||
,
|
||
<date id="9D5900D26761D02BFD8FFA33FD2B3EA9" box="[574,692,1408,1432]" pageId="3" pageNumber="164" value="1931-11-26">
|
||
<collectingDate id="8D1DF93A6761D02BFD8FFA33FD2B3EA9" box="[574,692,1408,1432]" pageId="3" pageNumber="164" value="1931-11-26">26.XI.1931</collectingDate>
|
||
</date>
|
||
,
|
||
<emphasis id="DB93FA006761D02BFD77FA32FF283E82" italics="true" pageId="3" pageNumber="164">Decary 9432</emphasis>
|
||
(
|
||
<collectionCode id="8FF6BED76761D02BFF74FA29FF4B3E83" box="[197,212,1434,1458]" country="France" lsid="urn:lsid:biocol.org:col:15763" name="Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants" pageId="3" pageNumber="164" type="Herbarium">P</collectionCode>
|
||
[
|
||
<specimenCode id="B9418E696761D02BFF68FA29FEC83E83" box="[217,343,1434,1458]" collectionCode="P" country="France" lsid="urn:lsid:biocol.org:col:15763" name="Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants" pageId="3" pageNumber="164" type="Herbarium">P00217865</specimenCode>
|
||
]!)
|
||
</materialsCitation>
|
||
.
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFF35FA60FE8A3EDA" blockId="3.[130,776,1491,1741]" box="[132,277,1491,1517]" pageId="3" pageNumber="164">DESCRIPTION</paragraph>
|
||
<paragraph id="E95826126761D02BFF35FA40FE803D3C" blockId="3.[130,776,1491,1741]" box="[132,287,1523,1549]" pageId="3" pageNumber="164">
|
||
<emphasis id="DB93FA006761D02BFF35FA40FE803D3C" box="[132,287,1523,1549]" italics="true" pageId="3" pageNumber="164">Forme générale</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFF35F9A1FD8A3DFD" blockId="3.[130,776,1491,1741]" pageId="3" pageNumber="164">
|
||
Arbrisseau épineux de grande taille, pouvant dépasser les
|
||
<quantity id="2E1F8BF76761D02BFD6FF9A1FC983D1C" box="[734,775,1554,1581]" metricMagnitude="0" metricUnit="m" metricValue="6.0" pageId="3" pageNumber="164" unit="m" value="6.0">6 m</quantity>
|
||
de hauteur, ayant la forme générale d’un cône renversé. Racine fibreuse, non napiforme. Tronc de
|
||
<quantity id="2E1F8BF76761D02BFE4EF9E1FDF63D5C" box="[511,617,1618,1645]" metricMagnitude="-1" metricUnit="m" metricValue="2.0" metricValueMax="3.0" metricValueMin="1.0" pageId="3" pageNumber="164" unit="cm" value="20.0" valueMax="30.0" valueMin="10.0">10-30 cm</quantity>
|
||
de diamètre à la base, de
|
||
<quantity id="2E1F8BF76761D02BFF4EF9C1FEC33DBC" box="[255,348,1650,1677]" metricMagnitude="-1" metricUnit="m" metricValue="1.25" metricValueMax="2.0" metricValueMin="0.5" pageId="3" pageNumber="164" unit="cm" value="12.5" valueMax="20.0" valueMin="5.0">5-20 cm</quantity>
|
||
de hauteur, parfois presqu’entièrement enterré, très rapidement ramifié en 5-10 tiges principales ascendantes de
|
||
<quantity id="2E1F8BF76761D02BFE9DF901FE183DFC" box="[300,391,1714,1741]" metricMagnitude="-2" metricUnit="m" metricValue="8.5" metricValueMax="12.0" metricValueMin="5.0" pageId="3" pageNumber="164" unit="cm" value="8.5" valueMax="12.0" valueMin="5.0">5-12 cm</quantity>
|
||
de diamètre.
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFF35F940FF273C3D" blockId="3.[130,777,1779,2028]" box="[132,184,1779,1804]" pageId="3" pageNumber="164">
|
||
<emphasis id="DB93FA006761D02BFF35F940FF273C3D" box="[132,184,1779,1804]" italics="true" pageId="3" pageNumber="164">Tiges</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFF35F8A1FE243CDD" blockId="3.[130,777,1779,2028]" pageId="3" pageNumber="164">
|
||
Grises, rugueuses, d’abord verticales, puis légèrement penchées,
|
||
<quantity id="2E1F8BF76761D02BFF33F882FF5C3C7D" box="[130,195,1841,1868]" metricMagnitude="0" metricUnit="m" metricValue="4.5" metricValueMax="6.0" metricValueMin="3.0" pageId="3" pageNumber="164" unit="m" value="4.5" valueMax="6.0" valueMin="3.0">3-6 m</quantity>
|
||
de longueur, peu ramifiées (des ramifications de
|
||
<quantity id="2E1F8BF76761D02BFD7AF882FF063C5D" metricMagnitude="0" metricUnit="m" metricValue="1.25" metricValueMax="2.0" metricValueMin="0.5" pageId="3" pageNumber="164" unit="m" value="1.25" valueMax="2.0" valueMin="0.5">0,5-2 m</quantity>
|
||
de long largement espacées). Présence occasionnelle sur les vieilles tiges épaissies de bourgeons courts (brachyblastes) 15 ×
|
||
<quantity id="2E1F8BF76761D02BFF06F822FF663C9D" box="[183,249,1937,1964]" metricMagnitude="-3" metricUnit="m" metricValue="4.0" pageId="3" pageNumber="164" unit="mm" value="4.0">4 mm</quantity>
|
||
, garnis au sommet d’épines minuscules (
|
||
<quantity id="2E1F8BF76761D02BFD13F822FD643C9D" box="[674,763,1937,1964]" metricMagnitude="-3" metricUnit="m" metricValue="2.5" metricValueMax="4.0" metricValueMin="1.0" pageId="3" pageNumber="164" unit="mm" value="2.5" valueMax="4.0" valueMin="1.0">1-4 mm</quantity>
|
||
), surmontés d’un bouquet de 2-3 petites feuilles. Extrémité des tiges de diamètre
|
||
<quantity id="2E1F8BF76761D02BFEF1F862FE273CDD" box="[320,440,2001,2028]" metricMagnitude="-2" metricUnit="m" metricValue="1.25" metricValueMax="1.5" metricValueMin="1.0" pageId="3" pageNumber="164" unit="mm" value="12.5" valueMax="15.0" valueMin="10.0">10-15 mm</quantity>
|
||
.
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CFF6AFCEF3BC4" blockId="3.[810,1456,217,433]" box="[813,880,217,245]" pageId="3" pageNumber="164">
|
||
<emphasis id="DB93FA006761D02BFC9CFF6AFCEF3BC4" box="[813,880,217,245]" italics="true" pageId="3" pageNumber="164">Épines</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CFF4AFA2F3A81" blockId="3.[810,1456,217,433]" pageId="3" pageNumber="164">
|
||
Épines (aux extrémités des tiges) 17 ×
|
||
<quantity id="2E1F8BF76761D02BFB16FF44FB783A23" box="[1191,1255,247,274]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="3" pageNumber="164" unit="mm" value="2.0">2 mm</quantity>
|
||
, grises, perpendiculaires à l’axe de la tige ou légèrement recourbées vers le bas, peu densément disposées,toutes de taille identique, solitaires,géminées de chaque côté des feuilles ou de leurs cicatrices. Les épines sont plus petites (
|
||
<quantity id="2E1F8BF76761D02BFC1AFEC5FB8F3AA0" box="[939,1040,374,401]" metricMagnitude="-3" metricUnit="m" metricValue="7.5" metricValueMax="10.0" metricValueMin="5.0" pageId="3" pageNumber="164" unit="mm" value="7.5" valueMax="10.0" valueMin="5.0">5-10 mm</quantity>
|
||
), solitaires, encore moins densément disposées, parfois même quasi absentes au bas des tiges principales.
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CFE65FCE63AC1" blockId="3.[811,1457,470,848]" box="[813,889,470,496]" pageId="3" pageNumber="164">
|
||
<emphasis id="DB93FA006761D02BFC9CFE65FCE63AC1" box="[813,889,470,496]" italics="true" pageId="3" pageNumber="164">Feuilles</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CFE45FBD0387E" blockId="3.[811,1457,470,848]" pageId="3" pageNumber="164">
|
||
Généralement caulinaires et solitaires sur les 20-50 derniers cm des tiges, ou groupées par 2 à l’extrémité des brachyblastes, en moyenne 30 ×
|
||
<quantity id="2E1F8BF76761D02BFC46FD85FBD43960" box="[1015,1099,566,593]" metricMagnitude="-2" metricUnit="m" metricValue="1.5" pageId="3" pageNumber="164" unit="mm" value="15.0">15 mm</quantity>
|
||
, jusqu’à 45 ×
|
||
<quantity id="2E1F8BF76761D02BFB59FD85FAA33960" box="[1256,1340,566,593]" metricMagnitude="-2" metricUnit="m" metricValue="2.2" pageId="3" pageNumber="164" unit="mm" value="22.0">22 mm</quantity>
|
||
, ondulées, de forme ovale, acuminées à l’apex avec un mucron de
|
||
<quantity id="2E1F8BF76761D02BFA12FDE5FCC139A1" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="3" pageNumber="164" unit="mm" value="2.0">2 mm</quantity>
|
||
, de couleur variant du vert, vert turquoise au rose sur le dessus, vert clair au-dessous. Limbe lisse et de texture cirée caoutchouteuse. Pétiole court 2 ×
|
||
<quantity id="2E1F8BF76761D02BFB2FFD05FB7C39E1" box="[1182,1251,694,720]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="3" pageNumber="164" unit="mm" value="1.0">1 mm</quantity>
|
||
, parfois inexistant. Nervation pennée, une nervure principale en relief sous la feuille, de couleur allant du blanc au niveau du pétiole à vert-rose à l’extrémité de la feuille, 8-15 nervures secondaires visibles surtout du dessous.
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CFCC6FC5938BE" blockId="3.[811,1457,885,1103]" box="[813,966,885,911]" pageId="3" pageNumber="164">
|
||
<emphasis id="DB93FA006761D02BFC9CFCC6FC5938BE" box="[813,966,885,911]" italics="true" pageId="3" pageNumber="164">Incyathescences</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CFC26FC453F7F" blockId="3.[811,1457,885,1103]" pageId="3" pageNumber="164">Pendantes, courtes et capitées, formées de 8-20 cyathiums, disposées surtout vers le sommet des tiges, 2-5 subterminales, au-dessus des feuilles, souvent 4-5 autres caulinaires dans les 20-50 derniers cm des tiges sur de minuscules bourgeons qui généralement ne se développeront pas, ni en ramification, ni en brachyblaste.</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CFBC7FC0B3FBF" blockId="3.[811,1456,1140,1358]" box="[813,916,1140,1166]" pageId="3" pageNumber="164">
|
||
<emphasis id="DB93FA006761D02BFC9CFBC7FC0B3FBF" box="[813,916,1140,1166]" italics="true" pageId="3" pageNumber="164">Pédoncule</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CFB27FC003E7F" blockId="3.[811,1456,1140,1358]" pageId="3" pageNumber="164">
|
||
Pédoncule principal recourbé, 13 ×
|
||
<quantity id="2E1F8BF76761D02BFB1BFB27FB723F9F" box="[1194,1261,1172,1198]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="3" pageNumber="164" unit="mm" value="2.0">2 mm</quantity>
|
||
, vert, non collant, très légèrement velouté, avec au-dessus un sillon longitudinal, terminé par deux bractées vert-marron rectangulaires
|
||
<quantity id="2E1F8BF76761D02BFA10FB67FCC63E3F" metricMagnitude="-3" metricUnit="m" metricValue="3.0" pageId="3" pageNumber="164" unit="mm" value="3.0">3 mm</quantity>
|
||
large ×
|
||
<quantity id="2E1F8BF76761D02BFC1AFB47FC743E3F" box="[939,1003,1268,1294]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="3" pageNumber="164" unit="mm" value="1.0">1 mm</quantity>
|
||
haut. Pédoncules suivants identiques mais plus courts. Ultimes bractées rouge bordeaux, triangulaires, 3 ×
|
||
<quantity id="2E1F8BF76761D02BFCE6FA80FC033E7F" box="[855,924,1331,1358]" metricMagnitude="-3" metricUnit="m" metricValue="3.0" pageId="3" pageNumber="164" unit="mm" value="3.0">3 mm</quantity>
|
||
.
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CFAC6FC0F3EBC" blockId="3.[813,1456,1397,1486]" box="[813,912,1397,1421]" pageId="3" pageNumber="164">
|
||
<emphasis id="DB93FA006761D02BFC9CFAC6FC0F3EBC" box="[813,912,1397,1421]" italics="true" pageId="3" pageNumber="164">Cyathium</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CFA20FA2F3EFC" blockId="3.[813,1456,1397,1486]" pageId="3" pageNumber="164">
|
||
Bisexué en forme de cloche, d’environ
|
||
<quantity id="2E1F8BF76761D02BFB6BFA20FAB53E9F" box="[1242,1322,1427,1454]" metricMagnitude="-2" metricUnit="m" metricValue="1.2" pageId="3" pageNumber="164" unit="mm" value="12.0">12 mm</quantity>
|
||
dans toutes ses dimensions, porté par un pédoncule vert de 4 ×
|
||
<quantity id="2E1F8BF76761D02BFAE2FA00FA333EFC" box="[1363,1452,1459,1486]" metricMagnitude="-3" metricUnit="m" metricValue="1.5" pageId="3" pageNumber="164" unit="mm" value="1.5">1,5 mm</quantity>
|
||
.
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9DFA40FC273D3C" blockId="3.[812,1455,1523,1645]" box="[812,952,1523,1549]" pageId="3" pageNumber="164">
|
||
<emphasis id="DB93FA006761D02BFC9DFA40FC273D3C" box="[812,952,1523,1549]" italics="true" pageId="3" pageNumber="164">Cyathophylles</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CF9A0FBCC3D5C" blockId="3.[812,1455,1523,1645]" pageId="3" pageNumber="164">
|
||
Jaune-vert à la base, rouge bordeaux veinés de jaune à l’extrémité, 12 ×
|
||
<quantity id="2E1F8BF76761D02BFC74F981FB893D7C" box="[965,1046,1586,1613]" metricMagnitude="-2" metricUnit="m" metricValue="1.5" pageId="3" pageNumber="164" unit="mm" value="15.0">15 mm</quantity>
|
||
une fois aplatis, largement ouverts, à extrémité apiculée (
|
||
<quantity id="2E1F8BF76761D02BFBB2F9E1FBD93D5C" box="[1027,1094,1618,1645]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="3" pageNumber="164" unit="mm" value="1.0">1 mm</quantity>
|
||
).
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CF921FC133D9D" blockId="3.[813,1321,1682,1741]" box="[813,908,1682,1708]" pageId="3" pageNumber="164">
|
||
<emphasis id="DB93FA006761D02BFC9CF921FC133D9D" box="[813,908,1682,1708]" italics="true" pageId="3" pageNumber="164">Involucre</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CF900FAB63DFC" blockId="3.[813,1321,1682,1741]" box="[813,1321,1714,1741]" pageId="3" pageNumber="164">
|
||
Jaune clair, conique à base arrondie, 4 ×
|
||
<quantity id="2E1F8BF76761D02BFB51F901FABA3DFC" box="[1248,1317,1714,1741]" metricMagnitude="-3" metricUnit="m" metricValue="4.0" pageId="3" pageNumber="164" unit="mm" value="4.0">4 mm</quantity>
|
||
.
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CF941FC1F3C3D" blockId="3.[813,1455,1778,1900]" box="[813,896,1778,1804]" pageId="3" pageNumber="164">
|
||
<emphasis id="DB93FA006761D02BFC9CF941FC1F3C3D" box="[813,896,1778,1804]" italics="true" pageId="3" pageNumber="164">Glandes</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CF8A1FAA73C5A" blockId="3.[813,1455,1778,1900]" pageId="3" pageNumber="164">
|
||
Cinq glandes jaunes, 2 ×
|
||
<quantity id="2E1F8BF76761D02BFBE1F8A1FB073C1D" box="[1104,1176,1810,1836]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="3" pageNumber="164" unit="mm" value="1.0">1 mm</quantity>
|
||
, contiguës, trapézoïdales arrondies à réniformes, la lèvre extérieure légèrement plus haute que l’intérieure, lisses, à marges continues.
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CF821FBAD3C9A" blockId="3.[813,1454,1937,2028]" box="[813,1074,1937,1964]" pageId="3" pageNumber="164">
|
||
<emphasis id="DB93FA006761D02BFC9CF821FBAD3C9A" box="[813,1074,1937,1964]" italics="true" pageId="3" pageNumber="164">Bractées interglandulaires</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126761D02BFC9CF801FB1D3CDA" blockId="3.[813,1454,1937,2028]" pageId="3" pageNumber="164">Jaunes à la base, fimbriées, tachetées de rouge bordeaux à l’extrémité, repliées sur l’ovaire.</paragraph>
|
||
<caption id="BD98769A6766D02CFF35F872FF6D3CD8" ID-DOI="http://doi.org/10.5281/zenodo.4602026" ID-Zenodo-Dep="4602026" httpUri="https://zenodo.org/record/4602026/files/figure.png" pageId="4" pageNumber="165" startId="4.[132,143,1985,2003]" targetBox="[202,1386,215,1954]" targetPageId="4">
|
||
<paragraph id="E95826126766D02CFF35F872FF6D3CD8" blockId="4.[132,1456,1984,2025]" pageId="4" pageNumber="165">
|
||
FIG. 1. —
|
||
<taxonomicName id="2EE75D916766D02CFF63F872FEED3CE2" authorityName="J.-P.Castillon" authorityYear="2018" box="[210,370,1985,2003]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="4" pageNumber="165" phylum="Tracheophyta" rank="species" species="gigantea">
|
||
<emphasis id="DB93FA006766D02CFF63F872FEED3CE2" box="[210,370,1985,2003]" italics="true" pageId="4" pageNumber="165">Euphorbia gigantea</emphasis>
|
||
</taxonomicName>
|
||
J.-P.Castillon,
|
||
<taxonomicNameLabel id="C0A0477B6766D02CFE5CF872FDAE3CE2" box="[493,561,1985,2003]" pageId="4" pageNumber="165" rank="species">sp.nov.</taxonomicNameLabel>
|
||
:
|
||
<emphasis id="DB93FA006766D02CFD86F872FDDB3CE2" bold="true" box="[567,580,1985,2003]" pageId="4" pageNumber="165">A</emphasis>
|
||
,
|
||
<emphasis id="DB93FA006766D02CFDFCF872FDC53CE2" bold="true" box="[589,602,1985,2003]" pageId="4" pageNumber="165">B</emphasis>
|
||
, port général;
|
||
<emphasis id="DB93FA006766D02CFD63F873FD7F3CE3" bold="true" box="[722,736,1984,2002]" pageId="4" pageNumber="165">C</emphasis>
|
||
, tige feuillue;
|
||
<emphasis id="DB93FA006766D02CFCE0F872FCC03CE2" bold="true" box="[849,863,1985,2003]" pageId="4" pageNumber="165">D</emphasis>
|
||
, extrémité des tiges portant de nombreuses incyathescences;
|
||
<emphasis id="DB93FA006766D02CFAD3F872FAF13CE2" bold="true" box="[1378,1390,1985,2003]" pageId="4" pageNumber="165">E</emphasis>
|
||
, cyathe en gros plan.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="E95826126767D02DFF35FF64FE883BC0" blockId="5.[130,776,215,369]" box="[132,279,215,241]" pageId="5" pageNumber="166">
|
||
<emphasis id="DB93FA006767D02DFF35FF64FE883BC0" box="[132,279,215,241]" italics="true" pageId="5" pageNumber="166">Fleurs femelles</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126767D02DFF35FF44FC973A40" blockId="5.[130,776,215,369]" pageId="5" pageNumber="166">
|
||
Ovaire sphérique,
|
||
<quantity id="2E1F8BF76767D02DFE8EFF44FEE03A23" box="[319,383,247,274]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="5" pageNumber="166" unit="mm" value="1.0">1 mm</quantity>
|
||
, légèrement poilu, rouge à la base, puis vert; 3 styles verts, droits,
|
||
<quantity id="2E1F8BF76767D02DFE36FEA4FE583A03" box="[391,455,279,306]" metricMagnitude="-3" metricUnit="m" metricValue="3.0" pageId="5" pageNumber="166" unit="mm" value="3.0">3 mm</quantity>
|
||
, d’abord soudés en une colonne de plus de
|
||
<quantity id="2E1F8BF76767D02DFF58FE84FEB83A60" box="[233,295,311,337]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="5" pageNumber="166" unit="mm" value="2.0">2mm</quantity>
|
||
, puis séparés,parfois bilobés à l’extrémité,terminés par des stigmates sphériques verts puis rouges en vieillissant.
|
||
</paragraph>
|
||
<paragraph id="E95826126767D02DFF35FE25FE9D3A81" blockId="5.[132,775,406,529]" box="[132,258,406,432]" pageId="5" pageNumber="166">
|
||
<emphasis id="DB93FA006767D02DFF35FE25FE9D3A81" box="[132,258,406,432]" italics="true" pageId="5" pageNumber="166">Fleurs mâles</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126767D02DFF35FE05FE6C3921" blockId="5.[132,775,406,529]" pageId="5" pageNumber="166">
|
||
15-20, apparaissant après la fleur femelle, émergeant des bractéoles blanches, à pédicelles et filets blancs longs de
|
||
<quantity id="2E1F8BF76767D02DFD0CFE65FC9C3AC0" box="[701,771,470,497]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="5" pageNumber="166" unit="mm" value="1.0">1 mm</quantity>
|
||
, deux anthères jaunes par étamine.
|
||
</paragraph>
|
||
<paragraph id="E95826126767D02DFF35FD84FF253961" blockId="5.[132,663,567,627]" box="[132,186,567,592]" pageId="5" pageNumber="166">
|
||
<emphasis id="DB93FA006767D02DFF35FD84FF253961" box="[132,186,567,592]" italics="true" pageId="5" pageNumber="166">Fruit</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126767D02DFF35FDE4FD083941" blockId="5.[132,663,567,627]" box="[132,663,598,627]" pageId="5" pageNumber="166">À 3 loges, de couleur bordeaux, à style persistant.</paragraph>
|
||
<paragraph id="E95826126767D02DFF35FD25FF4C3981" blockId="5.[132,297,662,720]" box="[132,211,662,688]" pageId="5" pageNumber="166">
|
||
<emphasis id="DB93FA006767D02DFF35FD25FF4C3981" box="[132,211,662,688]" italics="true" pageId="5" pageNumber="166">Graines</emphasis>
|
||
</paragraph>
|
||
<paragraph id="E95826126767D02DFF35FD05FEB639FE" blockId="5.[132,297,662,720]" box="[132,297,693,720]" pageId="5" pageNumber="166">Non observées.</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="A1FD75996767D02DFF35FD45FE3E3C3D" pageId="5" pageNumber="166" type="discussion">
|
||
<paragraph id="E95826126767D02DFF35FD45FE99383F" blockId="5.[130,777,758,1836]" box="[132,262,758,784]" pageId="5" pageNumber="166">DISCUSSION</paragraph>
|
||
<paragraph id="E95826126767D02DFF35FCA6FC983FDF" blockId="5.[130,777,758,1836]" pageId="5" pageNumber="166">
|
||
L’espèce la plus proche de
|
||
<taxonomicName id="2EE75D916767D02DFE19FCA5FD83381E" authorityName="J.-P.Castillon" authorityYear="2018" box="[424,540,790,815]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="gigantea">
|
||
<emphasis id="DB93FA006767D02DFE19FCA5FD83381E" box="[424,540,790,815]" italics="true" pageId="5" pageNumber="166">E. gigantea</emphasis>
|
||
</taxonomicName>
|
||
est sans aucun doute
|
||
<taxonomicName id="2EE75D916767D02DFF37FC85FEC6387E" authority="Leandri" authorityName="Leandri" authorityYear="1946" box="[134,345,821,847]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="croizatii">
|
||
<emphasis id="DB93FA006767D02DFF37FC85FF62387E" box="[134,253,822,847]" italics="true" pageId="5" pageNumber="166">E. croizatii</emphasis>
|
||
Leandri
|
||
</taxonomicName>
|
||
dont les inflorescences sont similaires. Je ne connais cette dernière que par son
|
||
<typeStatus id="365C98B06767D02DFD88FCE5FDF53841" box="[569,618,854,880]" pageId="5" pageNumber="166">type</typeStatus>
|
||
, sa description (
|
||
<bibRefCitation id="8D765BE36767D02DFF3CFCC6FEBD38BE" author="LEANDRI J." box="[141,290,885,911]" pageId="5" pageNumber="166" pagination="156 - 164" refId="ref4175" refString="LEANDRI J. 1946. - Contribution a l'etude des Euphorbiacees de Madagascar. X. Euphorbes du groupe Diacanthium. Notulae Systematicae 12: 156 - 164. https: // biodiversitylibrary. org / page / 7774469" type="journal article" year="1946">Leandri 1946</bibRefCitation>
|
||
) et les plantes que l’on peut voir en culture (mais dont l’origine et l’identification ne sont jamais assurées), n’étant jamais allé à sa station
|
||
<typeStatus id="365C98B06767D02DFE0EFC06FE7238FE" box="[447,493,949,975]" pageId="5" pageNumber="166">type</typeStatus>
|
||
(Ampilira,
|
||
<quantity id="2E1F8BF76767D02DFDD8FC07FD3038FE" box="[617,687,948,975]" metricMagnitude="4" metricUnit="m" metricValue="6.5" pageId="5" pageNumber="166" unit="km" value="65.0">65 km</quantity>
|
||
au nord d’Amboasary), aussi ne pourrais-je donner que les différences basées sur l’observation de l’échantillon de Decary. La première différence, évidente, entre
|
||
<taxonomicName id="2EE75D916767D02DFE12FBA6FD883F1F" authorityName="J.-P.Castillon" authorityYear="2018" box="[419,535,1045,1070]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="gigantea">
|
||
<emphasis id="DB93FA006767D02DFE12FBA6FD883F1F" box="[419,535,1045,1070]" italics="true" pageId="5" pageNumber="166">E. gigantea</emphasis>
|
||
</taxonomicName>
|
||
et
|
||
<taxonomicName id="2EE75D916767D02DFD88FBA6FD333F1F" authorityName="Leandri" authorityYear="1946" box="[569,684,1045,1070]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="croizatii">
|
||
<emphasis id="DB93FA006767D02DFD88FBA6FD333F1F" box="[569,684,1045,1070]" italics="true" pageId="5" pageNumber="166">E. croizatii</emphasis>
|
||
</taxonomicName>
|
||
est bien sûr la bien plus grande taille de
|
||
<taxonomicName id="2EE75D916767D02DFE7CFB86FDA03F7F" authorityName="J.-P.Castillon" authorityYear="2018" box="[461,575,1077,1102]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="gigantea">
|
||
<emphasis id="DB93FA006767D02DFE7CFB86FDA03F7F" box="[461,575,1077,1102]" italics="true" pageId="5" pageNumber="166">E. gigantea</emphasis>
|
||
</taxonomicName>
|
||
(qui peut dépasser
|
||
<quantity id="2E1F8BF76767D02DFF32FBE7FF313F5E" box="[131,174,1108,1135]" metricMagnitude="0" metricUnit="m" metricValue="6.0" pageId="5" pageNumber="166" unit="m" value="6.0">6 m</quantity>
|
||
de haut contre
|
||
<quantity id="2E1F8BF76767D02DFEE8FBE7FE5D3F5E" box="[345,450,1108,1135]" metricMagnitude="-1" metricUnit="m" metricValue="6.25" metricValueMax="7.5" metricValueMin="5.0" pageId="5" pageNumber="166" unit="cm" value="62.5" valueMax="75.0" valueMin="50.0">50-75 cm</quantity>
|
||
pour
|
||
<taxonomicName id="2EE75D916767D02DFDB7FBE6FDE63F5F" authorityName="Leandri" authorityYear="1946" box="[518,633,1109,1134]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="croizatii">
|
||
<emphasis id="DB93FA006767D02DFDB7FBE6FDE63F5F" box="[518,633,1109,1134]" italics="true" pageId="5" pageNumber="166">E. croizatii</emphasis>
|
||
</taxonomicName>
|
||
). Cette taille donne à
|
||
<taxonomicName id="2EE75D916767D02DFF6DFBC6FED23FBF" authorityName="J.-P.Castillon" authorityYear="2018" box="[220,333,1141,1166]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="gigantea">
|
||
<emphasis id="DB93FA006767D02DFF6DFBC6FED23FBF" box="[220,333,1141,1166]" italics="true" pageId="5" pageNumber="166">E. gigantea</emphasis>
|
||
</taxonomicName>
|
||
le port d’un
|
||
<taxonomicName id="2EE75D916767D02DFE63FBC7FDA63FBF" box="[466,569,1140,1166]" class="Insecta" family="Cerambycidae" genus="Alluaudia" kingdom="Animalia" order="Coleoptera" pageId="5" pageNumber="166" phylum="Arthropoda" rank="genus">
|
||
<emphasis id="DB93FA006767D02DFE63FBC7FDA63FBF" box="[466,569,1140,1166]" italics="true" pageId="5" pageNumber="166">Alluaudia</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<taxonomicName id="2EE75D916767D02DFDF9FBC7FF583F9F" authority="(Drake) Drake" authorityName="Drake" authorityYear="1903" baseAuthorityName="Drake" class="Insecta" family="Cerambycidae" genus="Alluaudia" kingdom="Animalia" order="Coleoptera" pageId="5" pageNumber="166" phylum="Arthropoda" rank="species" species="procera">
|
||
<emphasis id="DB93FA006767D02DFDF9FBC7FD313FBF" box="[584,686,1140,1166]" italics="true" pageId="5" pageNumber="166">A. procera</emphasis>
|
||
(Drake) Drake
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName id="2EE75D916767D02DFF65FB27FE673F9E" authority="(Drake) Drake" authorityName="Drake" authorityYear="1903" baseAuthorityName="Drake" box="[212,504,1172,1199]" class="Insecta" family="Cerambycidae" genus="Alluaudia" kingdom="Animalia" order="Coleoptera" pageId="5" pageNumber="166" phylum="Arthropoda" rank="species" species="ascendens">
|
||
<emphasis id="DB93FA006767D02DFF65FB27FECD3F9F" box="[212,338,1172,1198]" italics="true" pageId="5" pageNumber="166">A. ascendens</emphasis>
|
||
(Drake) Drake
|
||
</taxonomicName>
|
||
), avec des tiges longues et ascendantes, alors que
|
||
<taxonomicName id="2EE75D916767D02DFEC4FB06FE783FFF" authorityName="Leandri" authorityYear="1946" box="[373,487,1205,1230]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="croizatii">
|
||
<emphasis id="DB93FA006767D02DFEC4FB06FE783FFF" box="[373,487,1205,1230]" italics="true" pageId="5" pageNumber="166">E. croizatii</emphasis>
|
||
</taxonomicName>
|
||
est un petit buisson à tiges bien plus courbées. D’autres différences peuvent être notées:
|
||
</paragraph>
|
||
<paragraph id="E95826126767D02DFF2AFB47FEEA3E9F" blockId="5.[130,777,758,1836]" pageId="5" pageNumber="166">
|
||
– les épines, densément disposées, de taille irrégulière chez
|
||
<taxonomicName id="2EE75D916767D02DFF32FAA7FF693E1C" authorityName="Leandri" authorityYear="1946" box="[131,246,1300,1325]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="croizatii">
|
||
<emphasis id="DB93FA006767D02DFF32FAA7FF693E1C" box="[131,246,1300,1325]" italics="true" pageId="5" pageNumber="166">E. croizatii</emphasis>
|
||
</taxonomicName>
|
||
où chaque grosse épine (
|
||
<quantity id="2E1F8BF76767D02DFDB4FAA7FDE53E1F" box="[517,634,1300,1326]" metricMagnitude="-2" metricUnit="m" metricValue="1.5" metricValueMax="1.8" metricValueMin="1.2" pageId="5" pageNumber="166" unit="mm" value="15.0" valueMax="18.0" valueMin="12.0">12-18 mm</quantity>
|
||
) est toujours accompagnée par 3-5 autres plus petites (
|
||
<quantity id="2E1F8BF76767D02DFDFDFA80FD353E7F" box="[588,682,1331,1358]" metricMagnitude="-3" metricUnit="m" metricValue="5.5" metricValueMax="8.0" metricValueMin="3.0" pageId="5" pageNumber="166" unit="mm" value="5.5" valueMax="8.0" valueMin="3.0">3-8 mm</quantity>
|
||
), le tout formant une petite bosse sur la tige, alors qu’elles sont bien moins denses, bien plus constantes en taille chez
|
||
<taxonomicName id="2EE75D916767D02DFD22FAC7FC983EBC" authorityName="J.-P.Castillon" authorityYear="2018" box="[659,775,1396,1421]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="gigantea">
|
||
<emphasis id="DB93FA006767D02DFD22FAC7FC983EBC" box="[659,775,1396,1421]" italics="true" pageId="5" pageNumber="166">E. gigantea</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<quantity id="2E1F8BF76767D02DFF3CFA20FF7F3E9F" box="[141,224,1427,1454]" metricMagnitude="-2" metricUnit="m" metricValue="1.5" pageId="5" pageNumber="166" unit="mm" value="15.0">15 mm</quantity>
|
||
), et solitaires;
|
||
</paragraph>
|
||
<paragraph id="E95826126767D02DFF2AFA00FC9F3EDC" blockId="5.[130,777,758,1836]" pageId="5" pageNumber="166">
|
||
– les brachyblastes, abondants sur l’échantillon
|
||
<typeStatus id="365C98B06767D02DFD04FA00FD7B3EFC" box="[693,740,1459,1485]" pageId="5" pageNumber="166">type</typeStatus>
|
||
de
|
||
<taxonomicName id="2EE75D916767D02DFF37FA67FF683EDC" authorityName="Leandri" authorityYear="1946" box="[134,247,1492,1517]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="croizatii">
|
||
<emphasis id="DB93FA006767D02DFF37FA67FF683EDC" box="[134,247,1492,1517]" italics="true" pageId="5" pageNumber="166">E. croizatii</emphasis>
|
||
</taxonomicName>
|
||
, sont bien plus rares et espacés chez
|
||
<taxonomicName id="2EE75D916767D02DFD33FA67FD693EDC" authorityName="J.-P.Castillon" authorityYear="2018" box="[642,758,1492,1517]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="gigantea">
|
||
<emphasis id="DB93FA006767D02DFD33FA67FD693EDC" box="[642,758,1492,1517]" italics="true" pageId="5" pageNumber="166">E. gigantea</emphasis>
|
||
</taxonomicName>
|
||
;
|
||
</paragraph>
|
||
<paragraph id="E95826126767D02DFF2AFA40FE5C3D1C" blockId="5.[130,777,758,1836]" pageId="5" pageNumber="166">
|
||
– les feuilles, 8-10 ×
|
||
<quantity id="2E1F8BF76767D02DFE33FA41FE433D3C" box="[386,476,1522,1549]" metricMagnitude="-3" metricUnit="m" metricValue="5.5" metricValueMax="6.0" metricValueMin="5.0" pageId="5" pageNumber="166" unit="mm" value="5.5" valueMax="6.0" valueMin="5.0">5-6 mm</quantity>
|
||
chez
|
||
<taxonomicName id="2EE75D916767D02DFDAEFA40FD0E3D3D" authorityName="Leandri" authorityYear="1946" box="[543,657,1523,1548]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="croizatii">
|
||
<emphasis id="DB93FA006767D02DFDAEFA40FD0E3D3D" box="[543,657,1523,1548]" italics="true" pageId="5" pageNumber="166">E. croizatii</emphasis>
|
||
</taxonomicName>
|
||
atteignent 45 ×
|
||
<quantity id="2E1F8BF76767D02DFF0DF9A0FE943D1C" box="[188,267,1555,1581]" metricMagnitude="-2" metricUnit="m" metricValue="2.2" pageId="5" pageNumber="166" unit="mm" value="22.0">22 mm</quantity>
|
||
chez
|
||
<taxonomicName id="2EE75D916767D02DFEF8F9A0FE223D1D" authorityName="J.-P.Castillon" authorityYear="2018" box="[329,445,1555,1580]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="gigantea">
|
||
<emphasis id="DB93FA006767D02DFEF8F9A0FE223D1D" box="[329,445,1555,1580]" italics="true" pageId="5" pageNumber="166">E. gigantea</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
<paragraph id="E95826126767D02DFF2AF980FE3E3C3D" blockId="5.[130,777,758,1836]" pageId="5" pageNumber="166">
|
||
<taxonomicName id="2EE75D916767D02DFF2AF980FE933D7D" authorityName="J.-P.Castillon" authorityYear="2018" box="[155,268,1587,1612]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="gigantea">
|
||
<emphasis id="DB93FA006767D02DFF2AF980FE933D7D" box="[155,268,1587,1612]" italics="true" pageId="5" pageNumber="166">E. gigantea</emphasis>
|
||
</taxonomicName>
|
||
et
|
||
<taxonomicName id="2EE75D916767D02DFE99F980FE063D7D" authorityName="Leandri" authorityYear="1946" box="[296,409,1587,1612]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="croizatii">
|
||
<emphasis id="DB93FA006767D02DFE99F980FE063D7D" box="[296,409,1587,1612]" italics="true" pageId="5" pageNumber="166">E. croizatii</emphasis>
|
||
</taxonomicName>
|
||
sont donc proches du point de vue des inflorescences, mais chez de nombreux
|
||
<emphasis id="DB93FA006767D02DFDF1F9E0FD273D5C" box="[576,696,1619,1645]" italics="true" pageId="5" pageNumber="166">Goniostema</emphasis>
|
||
ce sont plus les caractères végétatifs qui séparent les espèces que les caractères floraux. Ici, la différence de taille et de port entre les deux espèces, la séparation géographique des stations et l’absence de plantes à la morphologie intermédiaire justifient le statut d’espèce nouvelle.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection id="A1FD75996767D02DFF2AF8A1FADE3901" pageId="5" pageNumber="166" type="description">
|
||
<paragraph id="E95826126767D02DFF2AF8A1FC973C1D" blockId="5.[130,777,758,1836]" box="[155,776,1810,1836]" pageId="5" pageNumber="166">
|
||
<taxonomicName id="2EE75D916767D02DFF2AF8A1FE963C1A" authorityName="J.-P.Castillon" authorityYear="2018" box="[155,265,1810,1835]" class="Magnoliopsida" family="Euphorbiaceae" genus="Euphorbia" kingdom="Plantae" order="Malpighiales" pageId="5" pageNumber="166" phylum="Tracheophyta" rank="species" species="gigantea">
|
||
<emphasis id="DB93FA006767D02DFF2AF8A1FE963C1A" box="[155,265,1810,1835]" italics="true" pageId="5" pageNumber="166">E. gigantea</emphasis>
|
||
</taxonomicName>
|
||
est le plus grand
|
||
<emphasis id="DB93FA006767D02DFE04F8A1FDB33C1D" box="[437,556,1810,1836]" italics="true" pageId="5" pageNumber="166">Goniostema</emphasis>
|
||
connu actuellement.
|
||
</paragraph>
|
||
<paragraph id="E95826126767D02DFF35F8E0FE3E3C5B" blockId="5.[132,777,1875,2028]" box="[132,417,1875,1901]" pageId="5" pageNumber="166">STATUT DE CONSERVATION</paragraph>
|
||
<paragraph id="E95826126767D02DFF35F8C2FADE3901" blockId="5.[132,777,1875,2028]" lastBlockId="5.[811,1457,215,561]" pageId="5" pageNumber="166">
|
||
Cette plante, que j’ai trouvée au bord de la RN13 entre Amboasary et Ranomainty, semble aussi exister dans l’Andohahelo, vers Hazofotsy (collectes de Decary et de Phillipson), soit
|
||
<quantity id="2E1F8BF76767D02DFF37F862FF513CDA" box="[134,206,2001,2027]" metricMagnitude="4" metricUnit="m" metricValue="2.0" pageId="5" pageNumber="166" unit="km" value="20.0">20 km</quantity>
|
||
plus au nord, dans une zone bénéficiant d’une réelle protection du MNP. Sa zone d’occurrence est donc supérieure à
|
||
<quantity id="2E1F8BF76767D02DFC34FF44FC433A24" box="[901,988,247,277]" metricMagnitude="5" metricUnit="m" metricValue="1.0" pageId="5" pageNumber="166" unit="km" value="100.0">100 km</quantity>
|
||
²; au moins trois populations sont connues mais il est probable qu’il y en ait plus car la zone est d’accès difficile et contrôlé. Les populations sont cependant assez petites (chaque population est formée de quelques dizaines d’individus pour une surface d’environ un millier de m²). En l’absence de données sur le déclin des populations ou la diminution des zones d’occurrence ou d’occupation, les seuls critères évaluables reposent donc sur les localités connues et la taille des populations, aussi, au vu des critères de l’UICN (2012), un statut VU (D2) me semble approprié.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |