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<document ID-DOI="http://doi.org/10.5281/zenodo.5187074" ID-ISSN="1639-4798" ID-Zenodo-Dep="5187074" approvalRequired="13" approvalRequired_for_textStreams="13" checkinTime="1628768937924" checkinUser="carolina" docAuthor="Stone, Robert Douglas" docDate="2006" docId="03EB87EFFF86FFFB0D321E8FFCF3FA48" docLanguage="en" docName="Adansonia.28.2.337-358.pdf" docOrigin="Adansonia (3) 28 (2)" docStyle="DocumentStyle:7E81836D30F26F6CECD5F7ABFAAC2CA1.1:Adansonia.2005-2008.journal_article" docStyleId="7E81836D30F26F6CECD5F7ABFAAC2CA1" docStyleName="Adansonia.2005-2008.journal_article" docStyleVersion="1" docTitle="Memecylon impressivenum R. D. Stone 2006, sp. nov." docType="treatment" docVersion="2" lastPageNumber="348" masterDocId="FFD2FF97FF8DFFF00D4D1F39FFCCFFEE" masterDocTitle="New species of Memecylon L. and Warneckea Gilg (Melastomataceae) from Madagascar and Mayotte" masterLastPageNumber="358" masterPageNumber="337" pageId="11" pageNumber="348" updateTime="1628770741761" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0" zenodo-license-figures="CC-BY-4.0">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>New species of Memecylon L. and Warneckea Gilg (Melastomataceae) from Madagascar and Mayotte</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Stone, Robert Douglas</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>Adansonia</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2006</mods:date>
<mods:detail type="series">
<mods:title>3</mods:title>
</mods:detail>
<mods:detail type="volume">
<mods:number>28</mods:number>
</mods:detail>
<mods:detail type="issue">
<mods:number>2</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>337</mods:start>
<mods:end>358</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://doi.org/10.5281/zenodo.5187074</mods:identifier>
<mods:identifier type="ISSN">1639-4798</mods:identifier>
<mods:identifier type="Zenodo-Dep">5187074</mods:identifier>
</mods:mods>
<treatment LSID="urn:lsid:plazi:treatment:03EB87EFFF86FFFB0D321E8FFCF3FA48" httpUri="http://treatment.plazi.org/id/03EB87EFFF86FFFB0D321E8FFCF3FA48" lastPageNumber="348" pageId="11" pageNumber="348">
<subSubSection box="[127,634,438,464]" pageId="11" pageNumber="348" type="nomenclature">
<paragraph blockId="11.[127,634,438,496]" box="[127,634,438,464]" pageId="11" pageNumber="348">
<heading box="[127,634,438,464]" centered="true" fontSize="11" level="2" pageId="11" pageNumber="348" reason="6">
<taxonomicName authority="R.D.Stone" authorityName="R. D. Stone" authorityYear="2006" box="[127,540,438,464]" class="Magnoliopsida" family="Melastomataceae" genus="Memecylon" kingdom="Plantae" order="Myrtales" pageId="11" pageNumber="348" phylum="Tracheophyta" rank="species" species="impressivenum" status="sp. nov.">
<emphasis bold="true" box="[127,415,438,464]" italics="true" pageId="11" pageNumber="348">Memecylon impressivenum</emphasis>
R.D.Stone
</taxonomicName>
,
<taxonomicNameLabel box="[551,634,438,464]" pageId="11" pageNumber="348" rank="species">sp. nov.</taxonomicNameLabel>
</heading>
</paragraph>
</subSubSection>
<subSubSection pageId="11" pageNumber="348" type="description">
<paragraph blockId="11.[127,634,438,496]" box="[340,420,470,496]" pageId="11" pageNumber="348">
(
<figureCitation box="[348,411,470,496]" captionStart="FIG" captionStartId="12.[113,124,1657,1674]" captionTargetBox="[156,1140,216,1600]" captionTargetId="figure-20@12.[112,1210,214,1608]" captionTargetPageId="12" captionText="FIG. 6. — Memecylon impressivenum R.D.Stone: A, habit; B, inflorescence with flower buds; C, petal; D, anther and part of filament. Stone et al. 2406. Scale bars: A, 3 cm; B, 2 mm; C, D, 1 mm." figureDoi="http://doi.org/10.5281/zenodo.5187098" httpUri="https://zenodo.org/record/5187098/files/figure.png" pageId="11" pageNumber="348">Fig. 6</figureCitation>
)
</paragraph>
<paragraph blockId="11.[113,648,527,656]" pageId="11" pageNumber="348">
<emphasis box="[113,179,527,550]" italics="true" pageId="11" pageNumber="348">Similis</emphasis>
M. inalato Jacq.-Fél.
<emphasis italics="true" pageId="11" pageNumber="348">a quo ramulis junioribus anguste quadrialatis non teretibus, foliis parvioribus ad apices late obtuseque acuminatis, venis transversis in paginis superioribus foliorum conspicue impressis, pedunculis brevioribus, floribus subsessilibus differt.</emphasis>
</paragraph>
<paragraph blockId="11.[111,646,680,836]" pageId="11" pageNumber="348">
<typeStatus box="[113,175,680,703]" pageId="11" pageNumber="348">TYPUS</typeStatus>
. —
<materialsCitation collectingDate="2001-12-08" collectionCode="CAS, G, K, MO, P, TAN, TEF, UC, US, WAG" country="Madagascar" elevation="150" latitude="-15.679167" location="Ampanavoana river" longLatPrecision="21" longitude="50.159725" municipality="Masoala" pageId="11" pageNumber="348" specimenCount="1" stateProvince="Antsiranana" typeStatus="holotype">
<emphasis bold="true" box="[218,341,680,703]" pageId="11" pageNumber="348">
<collectingCountry box="[218,337,680,703]" name="Madagascar" pageId="11" pageNumber="348">Madagascar</collectingCountry>
.
</emphasis>
<collectingRegion box="[347,557,680,703]" country="Madagascar" name="Antsiranana" pageId="11" pageNumber="348">Antsiranana province</collectingRegion>
,
<collectingMunicipality box="[566,646,680,703]" pageId="11" pageNumber="348">Masoala</collectingMunicipality>
peninsula, canyon of the
<location LSID="urn:lsid:plazi:treatment:03EB87EFFF86FFFB0D321E8FFCF3FA48:8E9D6022FF86FFFB0C1B1DFAFDC1FD34" box="[342,525,707,730]" country="Madagascar" latitude="-15.679167" longLatPrecision="21" longitude="50.159725" municipality="Masoala" name="Ampanavoana river" pageId="11" pageNumber="348" stateProvince="Antsiranana">Ampanavoana river</location>
,
<geoCoordinate box="[532,643,707,730]" degrees="15" direction="south" minutes="40" orientation="latitude" pageId="11" pageNumber="348" precision="15" seconds="45" value="-15.679167">15°4045”S</geoCoordinate>
,
<geoCoordinate box="[111,229,733,756]" degrees="50" direction="east" minutes="09" orientation="longitude" pageId="11" pageNumber="348" precision="15" seconds="35" value="50.159725">50°0935”E</geoCoordinate>
, alt.
<emphasis box="[276,292,733,756]" italics="true" pageId="11" pageNumber="348">c.</emphasis>
<quantity box="[297,363,733,756]" metricMagnitude="2" metricUnit="m" metricValue="1.5" pageId="11" pageNumber="348" unit="m" value="150.0">
<elevation box="[297,363,733,756]" metricMagnitude="2" metricUnit="m" metricValue="1.5" pageId="11" pageNumber="348" unit="m" value="150.0">150 m</elevation>
</quantity>
, understory of evergreen rain forest, relatively dry site on small spur ridge west of river,
<date box="[112,223,786,809]" pageId="11" pageNumber="348" value="2001-12-08">
<collectingDate box="[112,223,786,809]" pageId="11" pageNumber="348" value="2001-12-08">8.XII.2001</collectingDate>
</date>
,
<emphasis box="[233,387,786,809]" italics="true" pageId="11" pageNumber="348">Stone et al. 2406</emphasis>
(holo-,
<collectionCode box="[462,510,786,809]" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:15690" lsid="urn:lsid:biocol.org:col:34700" name="California Academy of Sciences" pageId="11" pageNumber="348" type="Museum">CAS</collectionCode>
; iso-,
<collectionCode box="[565,613,786,809]" country="USA" httpUri="http://biocol.org/urn:lsid:biocol.org:col:15690" lsid="urn:lsid:biocol.org:col:34700" name="California Academy of Sciences" pageId="11" pageNumber="348" type="Museum">CAS</collectionCode>
,
<collectionCode box="[621,642,786,809]" country="Switzerland" lsid="urn:lsid:biocol.org:col:15706" name="Conservatoire et Jardin botaniques de la Ville de Genève" pageId="11" pageNumber="348" type="Herbarium">G</collectionCode>
,
<collectionCode box="[112,131,813,836]" country="United Kingdom" lsid="urn:lsid:biocol.org:col:15867" name="Royal Botanic Gardens" pageId="11" pageNumber="348" type="Herbarium">K</collectionCode>
,
<collectionCode box="[142,188,813,836]" country="USA" lsid="urn:lsid:biocol.org:col:15859" name="Missouri Botanical Garden" pageId="11" pageNumber="348" type="Herbarium">MO</collectionCode>
,
<collectionCode box="[197,209,813,836]" country="France" lsid="urn:lsid:biocol.org:col:15763" name="Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants" pageId="11" pageNumber="348" type="Herbarium">P</collectionCode>
,
<collectionCode box="[218,271,813,836]" country="Madagascar" httpUri="http://biocol.org/urn:lsid:biocol.org:col:13842" lsid="urn:lsid:biocol.org:col:13842" name="Parc de Tsimbazaza" pageId="11" pageNumber="348" type="Herbarium">TAN</collectionCode>
,
<collectionCode box="[281,325,813,836]" country="Madagascar" httpUri="http://biocol.org/urn:lsid:biocol.org:col:12774" lsid="urn:lsid:biocol.org:col:12774" name="Centre National de la Recherche Appliquée au Developement Rural" pageId="11" pageNumber="348" type="Herbarium">TEF</collectionCode>
,
<collectionCode box="[335,374,813,836]" country="USA" name="Upjohn Culture Collection" pageId="11" pageNumber="348">UC</collectionCode>
,
<collectionCode box="[384,418,813,836]" country="South Africa" name="University of Stellenbosch" pageId="11" pageNumber="348">US</collectionCode>
,
<collectionCode box="[428,490,813,836]" country="Netherlands" httpUri="http://biocol.org/urn:lsid:biocol.org:col:15578" lsid="urn:lsid:biocol.org:col:15578" name="Wageningen University" pageId="11" pageNumber="348" type="Herbarium">WAG</collectionCode>
)
</materialsCitation>
.
</paragraph>
<paragraph blockId="11.[111,649,882,1700]" box="[113,258,882,908]" pageId="11" pageNumber="348">DESCRIPTION</paragraph>
<paragraph blockId="11.[111,649,882,1700]" lastBlockId="11.[677,1211,216,464]" pageId="11" pageNumber="348">
Evergreen shrub
<quantity box="[295,361,913,939]" metricMagnitude="0" metricUnit="m" metricValue="2.5" metricValueMax="3.0" metricValueMin="2.0" pageId="11" pageNumber="348" unit="m" value="2.5" valueMax="3.0" valueMin="2.0">2-3 m</quantity>
high; branchlets quadrangular and narrowly 4-winged when young (the wings ± straight to slightly crisped), becoming terete with age and thickened at the nodes; internodes
<quantity box="[181,257,1040,1066]" metricMagnitude="-2" metricUnit="m" metricValue="3.0" metricValueMax="4.0" metricValueMin="2.0" pageId="11" pageNumber="348" unit="cm" value="3.0" valueMax="4.0" valueMin="2.0">2-4 cm</quantity>
long. Leaves subcoriaceous, sessile or nearly so (petioles up to
<quantity box="[383,449,1072,1098]" metricMagnitude="-3" metricUnit="m" metricValue="1.0" pageId="11" pageNumber="348" unit="mm" value="1.0">1 mm</quantity>
long), dark green and somewhat shining on the upper surface, paler and dull beneath, rugose on both surfaces (when dry); blades elliptic-ovate,
<quantity box="[408,530,1167,1193]" metricMagnitude="-2" metricUnit="m" metricValue="4.5" metricValueMax="5.5" metricValueMin="3.5" pageId="11" pageNumber="348" unit="cm" value="4.5" valueMax="5.5" valueMin="3.5">3.5-5.5 cm</quantity>
long,
<quantity metricMagnitude="-2" metricUnit="m" metricValue="2.0" metricValueMax="2.5" metricValueMin="1.5" pageId="11" pageNumber="348" unit="cm" value="2.0" valueMax="2.5" valueMin="1.5">1.5- 2.5 cm</quantity>
wide, gradually rounded toward the base then narrowly subcordate above the petiole, apex broadly acuminate (the acumen
<emphasis box="[488,505,1262,1288]" italics="true" pageId="11" pageNumber="348">c.</emphasis>
<quantity box="[512,579,1262,1288]" metricMagnitude="-3" metricUnit="m" metricValue="5.0" pageId="11" pageNumber="348" unit="mm" value="5.0">5 mm</quantity>
long, obtuse); mid-nerve impressed on upper and lower surfaces; transverse veins oriented at an oblique angle relative to the mid-nerve, conspicuously impressed on the upper surface, obscure on the lower; lateral nerves situated
<quantity box="[277,385,1420,1446]" metricMagnitude="-3" metricUnit="m" metricValue="1.25" metricValueMax="1.5" metricValueMin="1.0" pageId="11" pageNumber="348" unit="mm" value="1.25" valueMax="1.5" valueMin="1.0">1-1.5 mm</quantity>
from the margin; young leaves strongly violaceous. Cymes umbelliform, 1- 5-flowered, axillary and solitary but often opposite, often hidden beneath the leaves; peduncles filiform,
<quantity box="[114,190,1547,1573]" metricMagnitude="-2" metricUnit="m" metricValue="1.5" metricValueMax="2.0" metricValueMin="1.0" pageId="11" pageNumber="348" unit="cm" value="1.5" valueMax="2.0" valueMin="1.0">1-2 cm</quantity>
long, quadrangular and narrowly 4-winged; bracts lanceolate,
<quantity box="[295,380,1579,1605]" metricMagnitude="-3" metricUnit="m" metricValue="1.5" metricValueMax="2.0" metricValueMin="1.0" pageId="11" pageNumber="348" unit="mm" value="1.5" valueMax="2.0" valueMin="1.0">1-2 mm</quantity>
long, the bracteoles similar but smaller. Flowers subsessile, ochroleucous; hypantho-calyx campanulate,
<emphasis box="[449,466,1642,1668]" italics="true" pageId="11" pageNumber="348">c.</emphasis>
<quantity box="[473,539,1642,1668]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="11" pageNumber="348" unit="mm" value="2.0">2 mm</quantity>
long and
<quantity box="[113,201,1674,1700]" metricMagnitude="-3" metricUnit="m" metricValue="2.8" pageId="11" pageNumber="348" unit="mm" value="2.8">2.8 mm</quantity>
wide; calyx shallowly 4-lobed, the lobes broadly rounded. Corolla rounded and apiculate in bud; petals suborbicular,
<quantity box="[986,1053,248,274]" metricMagnitude="-3" metricUnit="m" metricValue="2.0" pageId="11" pageNumber="348" unit="mm" value="2.0">2 mm</quantity>
long,
<quantity box="[1125,1211,248,274]" metricMagnitude="-3" metricUnit="m" metricValue="1.5" pageId="11" pageNumber="348" unit="mm" value="1.5">1.5 mm</quantity>
wide, apiculate, the margins scarious. Anthers
<quantity box="[679,765,311,337]" metricMagnitude="-3" metricUnit="m" metricValue="1.5" pageId="11" pageNumber="348" unit="mm" value="1.5">1.5 mm</quantity>
long, the connective shortly conical and ± incurved but lacking a dorsal gland, the pollen sacs occupying more than half the length on the ventral side; filaments
<emphasis box="[904,920,407,433]" italics="true" pageId="11" pageNumber="348">c.</emphasis>
<quantity box="[924,1008,407,433]" metricMagnitude="-3" metricUnit="m" metricValue="1.5" pageId="11" pageNumber="348" unit="mm" value="1.5">1.5 mm</quantity>
long. Style
<emphasis box="[1125,1142,407,433]" italics="true" pageId="11" pageNumber="348">c.</emphasis>
<quantity box="[1146,1210,407,433]" metricMagnitude="-3" metricUnit="m" metricValue="3.0" pageId="11" pageNumber="348" unit="mm" value="3.0">3 mm</quantity>
long. Fruits not seen.
</paragraph>
</subSubSection>
<subSubSection pageId="11" pageNumber="348" type="discussion">
<paragraph blockId="11.[674,1211,501,1446]" box="[677,777,501,527]" pageId="11" pageNumber="348">REMARKS</paragraph>
<paragraph blockId="11.[674,1211,501,1446]" pageId="11" pageNumber="348">
This species is known only from the
<typeStatus box="[1049,1094,533,559]" pageId="11" pageNumber="348">type</typeStatus>
collection. The long, slender peduncles and anthers lacking a dorsal gland suggest a close relationship with
<taxonomicName authority="Aug. DC." authorityName="Aug. DC." box="[679,893,628,654]" class="Magnoliopsida" family="Melastomataceae" genus="Memecylon" kingdom="Plantae" order="Myrtales" pageId="11" pageNumber="348" phylum="Tracheophyta" rank="species" species="alatum">
<emphasis box="[679,789,628,654]" italics="true" pageId="11" pageNumber="348">M. alatum</emphasis>
Aug.DC.
</taxonomicName>
,
<taxonomicName authority="Aug. DC." authorityName="Aug. DC." box="[901,1161,628,654]" class="Magnoliopsida" family="Melastomataceae" genus="Memecylon" kingdom="Plantae" order="Myrtales" pageId="11" pageNumber="348" phylum="Tracheophyta" rank="species" species="mocquerysii">
<emphasis box="[901,1056,628,654]" italics="true" pageId="11" pageNumber="348">M. mocquerysii</emphasis>
Aug.DC.
</taxonomicName>
, and
<taxonomicName box="[675,806,660,686]" class="Magnoliopsida" family="Melastomataceae" genus="Memecylon" kingdom="Plantae" order="Myrtales" pageId="11" pageNumber="348" phylum="Tracheophyta" rank="species" species="inalatum">
<emphasis box="[675,806,660,686]" italics="true" pageId="11" pageNumber="348">M. inalatum</emphasis>
</taxonomicName>
. It is perhaps most similar to
<taxonomicName class="Magnoliopsida" family="Melastomataceae" genus="Memecylon" kingdom="Plantae" order="Myrtales" pageId="11" pageNumber="348" phylum="Tracheophyta" rank="species" species="inalatum">
<emphasis italics="true" pageId="11" pageNumber="348">M. inalatum</emphasis>
</taxonomicName>
which is based on a fruiting specimen (
<emphasis italics="true" pageId="11" pageNumber="348">Capuron SF-24056</emphasis>
, P) from
<collectingRegion box="[882,1098,723,749]" country="Madagascar" name="Toamasina" pageId="11" pageNumber="348">Toamasina province</collectingRegion>
, Analalava forest on laterite west of Foulpointe (approximately
<quantity box="[675,758,787,813]" metricMagnitude="5" metricUnit="m" metricValue="2.3" pageId="11" pageNumber="348" unit="km" value="230.0">230 km</quantity>
to the south). A recent collection from the eastern Masoala peninsula,
<emphasis box="[958,1059,819,845]" italics="true" pageId="11" pageNumber="348">Aridy 123</emphasis>
(CAS, MO, P, TAN), is tentatively included in the circumscription of
<taxonomicName box="[706,842,882,908]" class="Magnoliopsida" family="Melastomataceae" genus="Memecylon" kingdom="Plantae" order="Myrtales" pageId="11" pageNumber="348" phylum="Tracheophyta" rank="species" species="inalatum">
<emphasis box="[706,842,882,908]" italics="true" pageId="11" pageNumber="348">M. inalatum</emphasis>
</taxonomicName>
, although it differs from the
<typeStatus box="[1163,1209,882,908]" pageId="11" pageNumber="348">type</typeStatus>
in some details (i.e. the somewhat smaller leaves with transverse veins obscure and the peduncles which are less than
<quantity box="[897,952,977,1003]" metricMagnitude="-2" metricUnit="m" metricValue="3.0" pageId="11" pageNumber="348" unit="cm" value="3.0">3 cm</quantity>
long and quadrangular in cross-section).
<emphasis box="[865,971,1009,1035]" italics="true" pageId="11" pageNumber="348">Aridy 123</emphasis>
has mainly fruits, but the specimen at CAS also has flower buds that are identical to those of
<taxonomicName authorityName="R. D. Stone" authorityYear="2006" box="[898,1088,1072,1098]" class="Magnoliopsida" family="Melastomataceae" genus="Memecylon" kingdom="Plantae" order="Myrtales" pageId="11" pageNumber="348" phylum="Tracheophyta" rank="species" species="impressivenum">
<emphasis box="[898,1088,1072,1098]" italics="true" pageId="11" pageNumber="348">M. impressivenum</emphasis>
</taxonomicName>
.
</paragraph>
<paragraph blockId="11.[674,1211,501,1446]" pageId="11" pageNumber="348">
Another species with umbellate cymules on long, axillary peduncles is the Tanzanian
<taxonomicName authority="Gilg" authorityName="Gilg" class="Magnoliopsida" family="Melastomataceae" genus="Memecylon" kingdom="Plantae" order="Myrtales" pageId="11" pageNumber="348" phylum="Tracheophyta" rank="species" species="cogniauxii">
<emphasis box="[1063,1209,1135,1161]" italics="true" pageId="11" pageNumber="348">M. cogniauxii</emphasis>
Gilg
</taxonomicName>
, under which
<taxonomicName box="[884,1045,1167,1193]" class="Magnoliopsida" family="Melastomataceae" genus="Memecylon" kingdom="Plantae" order="Myrtales" pageId="11" pageNumber="348" phylum="Tracheophyta" rank="species" species="mocquerysii">
<emphasis box="[884,1045,1167,1193]" italics="true" pageId="11" pageNumber="348">M. mocquerysii</emphasis>
</taxonomicName>
was previously placed as a synonym (Jacques-Félix 1985a: 432). While these two species superficially resemble one another, their branchlets and floral characteristics are remarkably different, and phylogenetic analyses of DNA sequences place
<taxonomicName box="[1004,1157,1325,1351]" class="Magnoliopsida" family="Melastomataceae" genus="Memecylon" kingdom="Plantae" order="Myrtales" pageId="11" pageNumber="348" phylum="Tracheophyta" rank="species" species="cogniauxii">
<emphasis box="[1004,1157,1325,1351]" italics="true" pageId="11" pageNumber="348">M. cogniauxii</emphasis>
</taxonomicName>
in a separate group along with most of the other east- African species sampled thus far (
<bibRefCitation author="STONE R. D." box="[1036,1162,1389,1415]" pageId="11" pageNumber="348" refId="ref10304" refString="STONE R. D. 2004. - Phylogenetic Systematics of Melastomataceae, Subfamily Olisbeoideae. Ph. D. dissertation, University of California, Berkeley, USA, 198 p." type="book" year="2004">Stone 2004</bibRefCitation>
and unpubl. data).
</paragraph>
</subSubSection>
</treatment>
</document>