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265 lines
25 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/phytokeys.170.59471" ID-GBIF-Dataset="c973a724-f64e-4420-9b52-c57c27e7f96a" ID-PMC="PMC7746669" ID-Pensoft-Pub="1314-2003-170-1" ID-Pensoft-UUID="FEDFCD1BAB1A5D8D8DE38003D8EBEEDD" ID-PubMed="33363432" ModsDocID="1314-2003-170-1" checkinTime="1607628098743" checkinUser="pensoft" docAuthor="Murdock, Andrew G., Chen, Cheng-Wei, Huang, Yao-Moan & Glenny, David" docDate="2020" docId="40E1B91D40435A1D9B9963DE96E8DCCA" docLanguage="en" docName="PhytoKeys 170: 1-23" docOrigin="PhytoKeys 170" docPubDate="2020-12-10" docSource="http://dx.doi.org/10.3897/phytokeys.170.59471" docTitle="Ptisana decipiens Murdock & C. W. Chen 2020, sp. nov." docType="treatment" docVersion="4" id="FEDFCD1BAB1A5D8D8DE38003D8EBEEDD" lastPageNumber="1" masterDocId="FEDFCD1BAB1A5D8D8DE38003D8EBEEDD" masterDocTitle="Affinities of the fern genus Ptisana (Marattiaceae) in the Solomon Islands, with descriptions of two new species" masterLastPageNumber="23" masterPageNumber="1" pageNumber="1" updateTime="1668140170847" updateUser="ExternalLinkService">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>Affinities of the fern genus Ptisana (Marattiaceae) in the Solomon Islands, with descriptions of two new species</mods:title>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Murdock, Andrew G.</mods:namePart>
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<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0001-7749-2857</mods:nameIdentifier>
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<mods:affiliation>Innovative Genomics Institute, University of California, Berkeley, 2151 Berkeley Way, Berkeley, California 94720, USA & University and Jepson Herbaria, University of California, Berkeley, 1001 Valley Life Sciences Building, Berkeley, California 94720, USA</mods:affiliation>
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<mods:nameIdentifier type="email">andymurdock@berkeley.edu</mods:nameIdentifier>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Chen, Cheng-Wei</mods:namePart>
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<mods:affiliation>No. 37, Lane 656, Chung Cheng Rd., Keelung City, 20246, Taiwan</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Huang, Yao-Moan</mods:namePart>
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<mods:affiliation>Taiwan Forestry Research Institute, No. 53, Nanhai Rd, Zhongzheng District, Taipei City, 10066, Taiwan</mods:affiliation>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Glenny, David</mods:namePart>
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<mods:affiliation>Allan Herbarium, Manaaki Whenua, PO Box 40, Lincoln 7640, New Zealand</mods:affiliation>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>PhytoKeys</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2020</mods:date>
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<mods:detail type="pubDate">
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<mods:number>2020-12-10</mods:number>
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</mods:detail>
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<mods:detail type="volume">
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<mods:number>170</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>1</mods:start>
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<mods:end>23</mods:end>
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</mods:extent>
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</mods:part>
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</mods:relatedItem>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/phytokeys.170.59471</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/phytokeys.170.59471</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1314-2003-170-1</mods:identifier>
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<mods:identifier type="Pensoft-UUID">FEDFCD1BAB1A5D8D8DE38003D8EBEEDD</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="170725656" LSID="urn:lsid:plazi:treatment:40E1B91D40435A1D9B9963DE96E8DCCA" httpUri="http://treatment.plazi.org/id/40E1B91D40435A1D9B9963DE96E8DCCA" lastPageNumber="1" pageId="0" pageNumber="1">
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<subSubSection pageId="0" pageNumber="1" type="nomenclature">
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<paragraph pageId="0" pageNumber="1">
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<taxonomicName LSID="40E1B91D-4043-5A1D-9B99-63DE96E8DCCA" authority="Murdock & C. W. Chen" authorityName="Murdock & C. W. Chen" authorityYear="2020" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana decipiens" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="species" species="decipiens" status="sp. nov.">Ptisana decipiens Murdock & C.W. Chen</taxonomicName>
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<taxonomicNameLabel pageId="0" pageNumber="1">sp. nov.</taxonomicNameLabel>
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Ptisana decipiens var. decipiens: A type specimen, with characteristically large segments B stipe showing scales C adaxial surface of fertile segments, showing vein spacing, synangial distance from margin, and winged costa. Ptisana decipiens var. delicata: D type specimen, with characteristically small segments E abaxial surface of fertile segment with maturing synangia. Photos: C. - W. Chen." figureDoi="10.3897/phytokeys.170.59471.figure4" httpUri="https://binary.pensoft.net/fig/485322" pageId="0" pageNumber="1">Figures 4A-D</figureCitation>
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<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Comparison of venation and margins (A-E) and apices of ultimate segments (F, G) of the Ptisana species in the Solomon Islands A, F P. ambulans B, G P. decipiens var. decipiens C, H P. decipiens var. delicata D, I P. papuana E, J P. smithii. Scale bars: 5 mm." figureDoi="10.3897/phytokeys.170.59471.figure6" httpUri="https://binary.pensoft.net/fig/485324" pageId="0" pageNumber="1">, 6B, G</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="materials_examined">
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<paragraph pageId="0" pageNumber="1">Type.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Solomon Islands</emphasis>
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.
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<emphasis bold="true" pageId="0" pageNumber="1">Guadalcanal</emphasis>
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: Logging site near Bomb Load Village, 300-400 m, 16 Aug 2012,
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<emphasis italics="true" pageId="0" pageNumber="1">C.-W. Chen & T.-C Hsu SITW00130</emphasis>
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.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Holotype</emphasis>
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: BSIP.
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<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Isotypes</emphasis>
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TAIF [417070, 417072], TNM.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="diagnosis">
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<paragraph pageId="0" pageNumber="1">Diagnosis.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Differs from
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<taxonomicName authorityName="Murdock" authorityYear="2008" baseAuthorityName="de Vriese" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana ternatea" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="species" species="ternatea">
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<emphasis italics="true" pageId="0" pageNumber="1">Ptisana ternatea</emphasis>
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</taxonomicName>
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(de Vriese) Murdock in having glabrous receptacles, synangia that do not extend to the apex of segments, pinnules gradually reducing in size toward the base of pinnae, and pinnule apices not abruptly acuminate. Differs from
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<taxonomicName authorityName="Murdock" authorityYear="2008" baseAuthorityName="Kuhn" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana melanesica" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="species" species="melanesica">
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<emphasis italics="true" pageId="0" pageNumber="1">Ptisana melanesica</emphasis>
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</taxonomicName>
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(Kuhn) Murdock in having larger pinnules with submarginal synangia and smaller marginal teeth. The marked variability in size of ultimate segments has not been recorded in any other
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<taxonomicName authorityName="A.G.G.Murdock" authorityYear="2008" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="genus">
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<emphasis italics="true" pageId="0" pageNumber="1">Ptisana</emphasis>
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</taxonomicName>
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species.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="description">
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<paragraph pageId="0" pageNumber="1">Description.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<taxonomicName authority="var. decipiens" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana decipiens subsp. var. var. decipiens" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="variety" species="decipiens" subSpecies="var." variety="decipiens">Ptisana decipiens var. decipiens</taxonomicName>
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: Fronds 3-pinnate, up to 2.5 m long. Stipe up to 1.2 m long, round in cross-section, surface green to brown, darkening with age, with reddish-blackish scales, the broader scales being darker in color, lenticels raised (Fig.
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Ptisana decipiens var. decipiens: A type specimen, with characteristically large segments B stipe showing scales C adaxial surface of fertile segments, showing vein spacing, synangial distance from margin, and winged costa. Ptisana decipiens var. delicata: D type specimen, with characteristically small segments E abaxial surface of fertile segment with maturing synangia. Photos: C. - W. Chen." figureDoi="10.3897/phytokeys.170.59471.figure4" httpUri="https://binary.pensoft.net/fig/485322" pageId="0" pageNumber="1">4B</figureCitation>
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). Fronds bearing 3 pairs of similarly sized pinnae on mature fronds, the terminal pair forking dichotomously at the frond apex, each pinna up to 1 m long. Swollen pulvini present at the base of all segments, green, smooth. Ultimate segments 5-12 pairs per pinnule, alternating on the costulae, largest at apex of each pinnule, smaller at the base, ultimate segments 9-18 cm long
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<normalizedToken originalValue="×">x</normalizedToken>
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1.5-2.5 cm wide, elliptic to oblong with an acuminate apex; pinnule costulae gently zigzagging and clearly winged between segments (Figs
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Ptisana decipiens var. decipiens: A type specimen, with characteristically large segments B stipe showing scales C adaxial surface of fertile segments, showing vein spacing, synangial distance from margin, and winged costa. Ptisana decipiens var. delicata: D type specimen, with characteristically small segments E abaxial surface of fertile segment with maturing synangia. Photos: C. - W. Chen." figureDoi="10.3897/phytokeys.170.59471.figure4" httpUri="https://binary.pensoft.net/fig/485322" pageId="0" pageNumber="1">4A</figureCitation>
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,
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<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Comparison of venation and margins (A-E) and apices of ultimate segments (F, G) of the Ptisana species in the Solomon Islands A, F P. ambulans B, G P. decipiens var. decipiens C, H P. decipiens var. delicata D, I P. papuana E, J P. smithii. Scale bars: 5 mm." figureDoi="10.3897/phytokeys.170.59471.figure6" httpUri="https://binary.pensoft.net/fig/485324" pageId="0" pageNumber="1">6G</figureCitation>
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). Laminae herbaceous-coriaceous, dark green above, pale below, with sparse brown-orange scales along the veins and midrib abaxially. Veins free, ca. 1.3 mm apart, rarely dividing once near the midrib (Fig.
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<figureCitation captionStart="Figure 6" captionStartId="F6" captionText="Figure 6. Comparison of venation and margins (A-E) and apices of ultimate segments (F, G) of the Ptisana species in the Solomon Islands A, F P. ambulans B, G P. decipiens var. decipiens C, H P. decipiens var. delicata D, I P. papuana E, J P. smithii. Scale bars: 5 mm." figureDoi="10.3897/phytokeys.170.59471.figure6" httpUri="https://binary.pensoft.net/fig/485324" pageId="0" pageNumber="1">6B</figureCitation>
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). Leaf margin gently serrate, more conspicuous at apex. Synangia green when immature, brown after opening, one per vein, submarginal, set back from leaf margin by 1-2 mm, ca. 1.8 mm long
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<normalizedToken originalValue="×">x</normalizedToken>
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0.8 mm wide, 14-20 locules per synangium (Fig.
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<figureCitation captionStart="Figure 4" captionStartId="F4" captionText="Figure 4. Ptisana decipiens var. decipiens: A type specimen, with characteristically large segments B stipe showing scales C adaxial surface of fertile segments, showing vein spacing, synangial distance from margin, and winged costa. Ptisana decipiens var. delicata: D type specimen, with characteristically small segments E abaxial surface of fertile segment with maturing synangia. Photos: C. - W. Chen." figureDoi="10.3897/phytokeys.170.59471.figure4" httpUri="https://binary.pensoft.net/fig/485322" pageId="0" pageNumber="1">4C</figureCitation>
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), receptacles glabrous.
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</paragraph>
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<caption doi="10.3897/phytokeys.170.59471.figure4" httpUri="https://binary.pensoft.net/fig/485322" pageId="0" pageNumber="1" start="Figure 4" startId="F4">
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Figure 4.</emphasis>
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<taxonomicName authority="var. decipiens" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana decipiens subsp. var. var. decipiens" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="variety" species="decipiens" subSpecies="var." variety="decipiens">Ptisana decipiens var. decipiens</taxonomicName>
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:
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<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
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type specimen, with characteristically large segments
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<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
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stipe showing scales
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<emphasis bold="true" pageId="0" pageNumber="1">C</emphasis>
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adaxial surface of fertile segments, showing vein spacing, synangial distance from margin, and winged costa.
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<taxonomicName authorityName="Murdock & C. W. Chen" authorityYear="2020" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana decipiens subsp. var. var. delicata" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="variety" species="decipiens" subSpecies="var." variety="delicata">Ptisana decipiens var. delicata</taxonomicName>
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:
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<emphasis bold="true" pageId="0" pageNumber="1">D</emphasis>
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type specimen, with characteristically small segments
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<emphasis bold="true" pageId="0" pageNumber="1">E</emphasis>
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abaxial surface of fertile segment with maturing synangia. Photos: C.-W. Chen.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="etymology">
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<paragraph pageId="0" pageNumber="1">Etymology.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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The epithet
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<taxonomicName authorityName="Murdock & C. W. Chen" authorityYear="2020" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana decipiens" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="species" species="decipiens">
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<emphasis italics="true" pageId="0" pageNumber="1">Ptisana decipiens</emphasis>
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</taxonomicName>
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(deceiving or misleading) refers to the morphological variation that has misled people into thinking two species were present.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="materials_examined">
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<paragraph pageId="0" pageNumber="1">Selected specimens examined.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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<emphasis bold="true" pageId="0" pageNumber="1">Solomon Islands. Choiseul</emphasis>
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: Sirebe, 128 m, 4 Aug 2014,
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<emphasis italics="true" pageId="0" pageNumber="1">C.-W. Chen, W.-S. Wu & M. Fanerii SITW05882</emphasis>
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(BSIP, TAIF [474134], TNM);
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<emphasis bold="true" pageId="0" pageNumber="1">Ranongga</emphasis>
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: Qiloe, 400-700 m, 16 Aug 2013,
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<emphasis italics="true" pageId="0" pageNumber="1">C.-W. Chen, T.-C. Hsu & M. Fanerii, SITW03102</emphasis>
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(BSIP, TAIF [448596], TNM);
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<emphasis bold="true" pageId="0" pageNumber="1">Guadalcanal</emphasis>
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: Vunga Tubu, 100-500 m, 27 Jul 2014,
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<emphasis italics="true" pageId="0" pageNumber="1">C.-W. Chen, T.-C. Hsu & M. Fanerii</emphasis>
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, SITW05767 (BSIP, TAIF [472271], TNM);
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<emphasis bold="true" pageId="0" pageNumber="1">Malaita</emphasis>
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: Mt. Saranifilu, 700-800 m, 30 Jan 2015,
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<emphasis italics="true" pageId="0" pageNumber="1">H.-C. Hung, C.-W. Chen & M. Fanerii SITW08836</emphasis>
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(BSIP, TAIF[501947], TNM);
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<emphasis bold="true" pageId="0" pageNumber="1">Makira</emphasis>
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: Materato to Mt. Gasi, 910 m, 1 Jul 2015,
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<emphasis italics="true" pageId="0" pageNumber="1">H.-C. Hung, C.-W. Chen & M. Fanerii SITW06724</emphasis>
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(BSIP, TAIF [482700], TNM).
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<emphasis bold="true" pageId="0" pageNumber="1">Papua New Guinea. Manus Province</emphasis>
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: Los Negros, 17 Nov 1944,
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<emphasis italics="true" pageId="0" pageNumber="1">W.H. Wagner Jr. 3277bis</emphasis>
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(US [1860271]);
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<emphasis bold="true" pageId="0" pageNumber="1">New Ireland</emphasis>
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: Ambitle Island, 150 m, 7 Nov 2003,
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<emphasis italics="true" pageId="0" pageNumber="1">W. Takeuchi 16691</emphasis>
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(US [3481228]).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="habitat">
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<paragraph pageId="0" pageNumber="1">Habitat and distribution.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Lowland forest, most commonly in gullies, also on hillsides below ridges. Commonly in association with
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<taxonomicName authorityName="Copeland" authorityYear="1936" class="Eusporangiopsida" family="Marattiaceae" genus="Angiopteris" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="Angiopteris microura" order="Marattiales" pageId="0" pageNumber="1" phylum="Pteridophyta" rank="species" species="microura">
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<emphasis italics="true" pageId="0" pageNumber="1">Angiopteris microura</emphasis>
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</taxonomicName>
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Copel. Elevation range: 0-1550 m. Common. Solomon Islands (Baga, Choiseul, Guadalcanal, Santa Isabel, Makira, Malaita, Mono, New Georgia, Nggatokae, Nggela Sule, Ranongga, Rendova, San Jorge, Ulawa, Tetepare); Bougainville; New Ireland. A collection from Fergusson Island (10 Nov 76,
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<emphasis italics="true" pageId="0" pageNumber="1">J.R. Croft 68741</emphasis>
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, BISH, K, NSW [507470], US [3324251]) may also be this species.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="preliminary conservation assessment">
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<paragraph pageId="0" pageNumber="1">Preliminary conservation assessment.</paragraph>
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<paragraph pageId="0" pageNumber="1">
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Both
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<taxonomicName authority="var. decipiens" lsidName="P. decipiens subsp. var. var. decipiens" pageId="0" pageNumber="1" rank="variety" species="decipiens" subSpecies="var." variety="decipiens">P. decipiens var. decipiens</taxonomicName>
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and
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<taxonomicName lsidName="P. decipiens subsp. var. var. delicata" pageId="0" pageNumber="1" rank="variety" species="decipiens" subSpecies="var." variety="delicata">P. decipiens var. delicata</taxonomicName>
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are widespread in the Solomon Islands and their habitat is not currently under significant threat. This species is currently considered Least Concern (LC) based on
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<bibRefCitation author="IUCN" journalOrPublisher="Kew Bulletin" pageId="0" pageNumber="1" publicationUrl="https://www.iucnredlist.org/" refId="B11" refString="IUCN, 2012. IUCN Red List Categories and Criteria, Version 3.1. 2nd edn. Prepared by the IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge. https://www.iucnredlist.org/" title="IUCN Red List Categories and Criteria, Version 3.1. 2 nd edn. Prepared by the IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge." url="https://www.iucnredlist.org/" year="2012">IUCN (2012)</bibRefCitation>
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.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="notes">
|
||
<paragraph pageId="0" pageNumber="1">Note.</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
There has been inconsistent use of the infraspecific ranks
|
||
<normalizedToken originalValue="“subspecies”">"subspecies"</normalizedToken>
|
||
and
|
||
<normalizedToken originalValue="“variety”">"variety"</normalizedToken>
|
||
through time, and even different preferences between pteridologists and other taxonomists (
|
||
<bibRefCitation DOI="https://doi.org/10.2307/1222819" author="Hamilton, CW" journalOrPublisher="Taxon" pageId="0" pageNumber="1" pagination="485 - 498" refId="B8" refString="Hamilton, CW, Reichard, SH, 1992. Current practice in the use of subspecies, variety, and forma in the classification of wild plants. Taxon 41 (3): 485 - 498, DOI: https://doi.org/10.2307/1222819" title="Current practice in the use of subspecies, variety, and forma in the classification of wild plants." url="https://doi.org/10.2307/1222819" volume="41" year="1992">Hamilton and Reichard 1992</bibRefCitation>
|
||
). We follow
|
||
<bibRefCitation DOI="https://doi.org/10.2307/1547158" author="Yatskievych, G" journalOrPublisher="American Fern Journal" pageId="0" pageNumber="1" pagination="36 - 45" refId="B31" refString="Yatskievych, G, Moran, RC, 1989. Primary divergence and species concepts in ferns. American Fern Journal 79 (2): 36 - 45, DOI: https://doi.org/10.2307/1547158" title="Primary divergence and species concepts in ferns." url="https://doi.org/10.2307/1547158" volume="79" year="1989">Yatskievych and Moran (1989)</bibRefCitation>
|
||
, who recommend the use of subspecies in situations specifically involving geographically defined variation. Because of the overlapping ranges of the two taxa described here, and the presence of intermediate forms, which might indicate hybridization or ongoing diversification, we opted for the rank of variety in this case.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
In most cases, the two varieties of
|
||
<taxonomicName lsidName="P. decipiens" pageId="0" pageNumber="1" rank="species" species="decipiens">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">P. decipiens</emphasis>
|
||
</taxonomicName>
|
||
are easy to distinguish based on segment size, but
|
||
<taxonomicName authority="var. decipiens" lsidName="P. decipiens subsp. var. var. decipiens" pageId="0" pageNumber="1" rank="variety" species="decipiens" subSpecies="var." variety="decipiens">P. decipiens var. decipiens</taxonomicName>
|
||
also has larger synangia with more locules. Occasional intermediates between the two varieties can be found, notably from Vella Lavella, New Georgia and Santa Isabel (Solomon Islands: Santa Isabel:
|
||
<emphasis italics="true" pageId="0" pageNumber="1">D. Glenny</emphasis>
|
||
7211 (BSIP, W); Vella Lavella: 25 Oct 2013
|
||
<emphasis italics="true" pageId="0" pageNumber="1">C.W. Chen, T.-C. Hsu & M. Fanerii SITW05013</emphasis>
|
||
(TAIF [463907], TNM); New Georgia: 13 May 2013,
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Y.-H. Chang, W.-H. Wu, C.-F. Chen, C.-H. Hung & M. Fanerii SITW02317</emphasis>
|
||
(BSIP, TAIF [443219], TNM). The habitat of both varieties is the same, but the two varieties have not been observed together in any collection site. The range of the two varieties overlaps, but
|
||
<taxonomicName authority="var. decipiens" lsidName="P. decipiens subsp. var. var. decipiens" pageId="0" pageNumber="1" rank="variety" species="decipiens" subSpecies="var." variety="decipiens">P. decipiens var. decipiens</taxonomicName>
|
||
is more widespread, while
|
||
<taxonomicName lsidName="P. decipiens subsp. var. var. delicata" pageId="0" pageNumber="1" rank="variety" species="decipiens" subSpecies="var." variety="delicata">P. decipiens var. delicata</taxonomicName>
|
||
is more common in the Western Province.
|
||
</paragraph>
|
||
<paragraph pageId="0" pageNumber="1">
|
||
The absence of indument on the receptacle is rare in
|
||
<taxonomicName authorityName="A.G.G.Murdock" authorityYear="2008" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Ptisana</emphasis>
|
||
</taxonomicName>
|
||
. This character was the basis for the obsolete genus
|
||
<taxonomicName class="Polypodiopsida" family="Marattiaceae" genus="Gymnotheca" higherTaxonomySource="GBIF" kingdom="Plantae" lsidName="Gymnotheca" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Gymnotheca</emphasis>
|
||
</taxonomicName>
|
||
C.Presl, in which Presl included one species currently recognized in
|
||
<taxonomicName authorityName="A.G.G.Murdock" authorityYear="2008" class="Polypodiopsida" family="Marattiaceae" genus="Ptisana" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Ptisana" order="Marattiales" pageId="0" pageNumber="1" phylum="Tracheophyta" rank="genus">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">Ptisana</emphasis>
|
||
</taxonomicName>
|
||
,
|
||
<taxonomicName lsidName="P. mertensiana" pageId="0" pageNumber="1" rank="species" species="mertensiana">
|
||
<emphasis italics="true" pageId="0" pageNumber="1">P. mertensiana</emphasis>
|
||
</taxonomicName>
|
||
(C.Presl) Murdock from the Caroline Islands.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |