372 lines
32 KiB
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372 lines
32 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/phytokeys.109.29359" ID-GBIF-Dataset="3f815c3a-8f6b-41a5-9cfc-9e4a5d5f493d" ID-PMC="PMC6189223" ID-Pensoft-Pub="1314-2003-109-53" ID-Pensoft-UUID="FF9C8D61FF9BFF9A941A720DFF954408" ID-PubMed="30337832" ID-Zenodo-Dep="1463312" ModsDocAuthor="" ModsDocDate="2018" ModsDocID="1314-2003-109-53" ModsDocOrigin="PhytoKeys " ModsDocTitle="Phlegmariurusvanuatuensis (Huperzioideae, Lycopodiaceae) a new species from Vanuatu, re-circumscription of P.nummulariifolius and new combinations in Phlegmariurus" checkinTime="1553125361231" checkinUser="pensoft" docAuthor="Field, Ashley Raymond" docDate="2018" docId="C0C7E47F85A3E81A7610D1C9B6C3264F" docLanguage="en" docName="PhytoKeys 109: 53-66" docOrigin="PhytoKeys 109" docSource="http://dx.doi.org/10.3897/phytokeys.109.29359" docTitle="Phlegmariurus vanuatuensis A. R. Field 2018, sp. nov." docType="treatment" docVersion="6" id="FF9C8D61FF9BFF9A941A720DFF954408" lastPageNumber="55" masterDocId="FF9C8D61FF9BFF9A941A720DFF954408" masterDocTitle="Phlegmariurus vanuatuensis (Huperzioideae, Lycopodiaceae) a new species from Vanuatu, re-circumscription of P. nummulariifolius and new combinations in Phlegmariurus" masterLastPageNumber="66" masterPageNumber="53" pageNumber="54" updateTime="1668139044281" 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>Phlegmariurus vanuatuensis (Huperzioideae, Lycopodiaceae) a new species from Vanuatu, re-circumscription of P. nummulariifolius and new combinations in Phlegmariurus</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>Field, Ashley Raymond</mods:namePart>
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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>2018</mods:date>
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<mods:detail type="volume">
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<mods:number>109</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>53</mods:start>
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<mods:end>66</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.109.29359</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.109.29359</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1314-2003-109-53</mods:identifier>
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<mods:identifier type="Pensoft-UUID">FF9C8D61FF9BFF9A941A720DFF954408</mods:identifier>
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<mods:identifier type="Zenodo-Dep">1463312</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="154472623" LSID="urn:lsid:plazi:treatment:C0C7E47F85A3E81A7610D1C9B6C3264F" httpUri="http://treatment.plazi.org/id/C0C7E47F85A3E81A7610D1C9B6C3264F" lastPageId="2" lastPageNumber="55" pageId="1" pageNumber="54">
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<subSubSection pageId="1" pageNumber="54" type="nomenclature">
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<paragraph pageId="1" pageNumber="54">
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<taxonomicName LSID="EB59AC11-42FC-5117-BE34-53C31EFD3926" authority="A. R. Field" authorityName="A. R. Field" authorityYear="2018" class="Lycopodiopsida" family="Lycopodiaceae" genus="Phlegmariurus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Phlegmariurus vanuatuensis" order="Lycopodiales" pageId="1" pageNumber="54" phylum="Pteridophyta" rank="species" species="vanuatuensis" status="sp. nov.">Phlegmariurus vanuatuensis A.R.Field</taxonomicName>
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<taxonomicNameLabel pageId="1" pageNumber="54">sp. nov.</taxonomicNameLabel>
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<figureCitation captionStart="Figure 1" captionStartId="F1" captionText="Figure 1. Phlegmariurus vanuatuensis ARF 1140: A habit, leaf arrangement and fertile spikes B close up of sterile leaf arrangement showing subopposite decussate leaf arrangement and ovate-oval leaves C close up of fertile spike showing scale like sporophylls and a sporangium. Scale bar: 10 cm (A); 1 cm (B, C). Illustration by A. R. Field." figureDoi="10.3897/phytokeys.109.29359.figure1" httpUri="https://binary.pensoft.net/fig/234053" pageId="1" pageNumber="54">
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Figure 1
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<normalizedToken originalValue="A–C">A-C</normalizedToken>
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</figureCitation>
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Phlegmariurus nummulariifolius ARF 0002: A basal region of shoot showing branching pattern and leaf arrangement B medial region of shoot showing adpressed leaf arrangement in facial and lateral view C distal region of shoot showing abrupt transition to sporophylls and filiform fertile spikes. Phlegmariurus vanuatuensis ARF 1140 D basal region of shoot showing branching pattern and leaf arrangement E medial region of shoot showing divergent leaf arrangement in facial and lateral view F distal region of shoot showing gradual transition to sporophylls and funiform-filiform fertile spikes. Photos by A. R. Field" figureDoi="10.3897/phytokeys.109.29359.figure2" httpUri="https://binary.pensoft.net/fig/234054" pageId="1" pageNumber="54">
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, Figure 2
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<normalizedToken originalValue="D–F">D-F</normalizedToken>
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</figureCitation>
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</paragraph>
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</subSubSection>
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<subSubSection pageId="1" pageNumber="54" type="diagnosis">
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<paragraph pageId="1" pageNumber="54">Diagnosis.</paragraph>
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<paragraph pageId="1" pageNumber="54">
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<taxonomicName authorityName="A. R. Field" authorityYear="2018" class="Lycopodiopsida" family="Lycopodiaceae" genus="Phlegmariurus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Phlegmariurus vanuatuensis" order="Lycopodiales" pageId="1" pageNumber="54" phylum="Pteridophyta" rank="species" species="vanuatuensis">
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<emphasis italics="true" pageId="1" pageNumber="54">Phlegmariurus vanuatuensis</emphasis>
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</taxonomicName>
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is similar to
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<taxonomicName authorityName="Ching, Acta Bot. Yunnan. 4 (2): 125" authorityYear="1982" baseAuthorityName="Blume" class="Lycopodiopsida" family="Lycopodiaceae" genus="Phlegmariurus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Phlegmariurus nummulariifolius" order="Lycopodiales" pageId="1" pageNumber="54" phylum="Pteridophyta" rank="species" species="nummulariifolius">
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<emphasis italics="true" pageId="1" pageNumber="54">Phlegmariurus nummulariifolius</emphasis>
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</taxonomicName>
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but differs in having acutely spreading non-flattened sterile leaves (compared with adpressed and imbricate leaves flattened in on plane in
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<taxonomicName lsidName="P. nummulariifolius" pageId="1" pageNumber="54" rank="species" species="nummulariifolius">
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<emphasis italics="true" pageId="1" pageNumber="54">P. nummulariifolius</emphasis>
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</taxonomicName>
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), thicker pale green-brown stem bases 3.5-5.5 mm diameter in
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<taxonomicName lsidName="P. vanuatuensis" pageId="1" pageNumber="54" rank="species" species="vanuatuensis">
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<emphasis italics="true" pageId="1" pageNumber="54">P. vanuatuensis</emphasis>
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</taxonomicName>
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(compared to thinner dark black-brown stem bases 1.5-3.5 mm diameter in
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<taxonomicName lsidName="P. nummulariifolius" pageId="1" pageNumber="54" rank="species" species="nummulariifolius">
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<emphasis italics="true" pageId="1" pageNumber="54">P. nummulariifolius</emphasis>
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</taxonomicName>
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) and a gradual transition to thicker less ramified fertile spikes 2-5.5 mm diameter in
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<taxonomicName lsidName="P. vanuatuensis" pageId="1" pageNumber="54" rank="species" species="vanuatuensis">
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<emphasis italics="true" pageId="1" pageNumber="54">P. vanuatuensis</emphasis>
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</taxonomicName>
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(compared to an abrupt transition to slender ramified fertile spikes 1-2.5 mm in
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<taxonomicName lsidName="P. nummulariifolius" pageId="1" pageNumber="54" rank="species" species="nummulariifolius">
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<emphasis italics="true" pageId="1" pageNumber="54">P. nummulariifolius</emphasis>
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</taxonomicName>
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).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="1" pageNumber="54" type="materials_examined">
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<paragraph pageId="1" pageNumber="54">Type.</paragraph>
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<paragraph pageId="1" pageNumber="54">
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Nouvelle-Hebrides: Erromango,
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<normalizedToken originalValue="forêt">foret</normalizedToken>
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dense au N du camp du km 17, alt. 300 m, 4 Aug 1971,
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<emphasis italics="true" pageId="1" pageNumber="54">J. Raynal RSNH 16213</emphasis>
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(Holotype: P01221002!; isotype: P01219313!).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="1" pageNumber="54" type="description">
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<paragraph pageId="1" pageNumber="54">Description.</paragraph>
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<paragraph pageId="1" pageNumber="54">
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Sporophytes herbaceous, epiphytic, with tufted isodichotomous arching to pendulous shoots and with dichotomous roots emerging from the base of the tuft. Shoots abruptly to gradually heterophyllous; sterile sections leafy, 12-18 mm in diameter and usually 20-50 cm long, evenly branched 1-4 times; fertile sections filiform-funiform, 2-4.5 mm in diameter and up to 300 mm long, branched 0-3 times, usually unbranched at base. Stems fleshy, 2.5-5.5 mm in diameter in basal module without the leaves, pale green or light stramineous brown, and bearing indistinct longitudinal grooves between the rows of leaves. Leaves sessile, supine, decurrent, firm, orthostichous in four strict rows comprised of 2 alternating sub whorls of 2, acutely spreading, ovate to ovate-oval, 6-14.5 mm long
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<normalizedToken originalValue="×">x</normalizedToken>
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6-9 mm wide, with a broad rounded base and rounded, obtusely pointed or acutely pointed apex, leaves flat to twisted with entire margins, mid glossy green to light yellow green. Leaves in the basal modules more crowded, ovate with an acute apex and with a narrowed sub-petiolate base, in median modules more widely spaced and diverging, sessile with an almost amplexicaule base, and in the distal modules transitioning in shape to sporophylls. Sporophylls gradually to sharply differentiated from sterile leaves, sessile, supine, orthostichous in two alternating pairs of two, acutely divergent to adpressed, scale like, ovate-rhomboid with a cuneate to rounded amplexicaule base and an acute apex, 1.5-5.2 mm long
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<normalizedToken originalValue="×">x</normalizedToken>
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1.5-2.8 mm wide, overlapping. Sporangia borne on the upper surface in the axils of sporangia, reniform, 1-1.2 mm in diameter, mostly covered by the sporophyll. Spores isotetrahedral, 30-40
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<normalizedToken originalValue="μm">μm</normalizedToken>
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in diameter, with convex lateral margins, smooth proximal surfaces and moderately foveolate distal surface. Gametophytes holomycoheterotrophic, dorsiventral with paraphyses among the gametangia on the upper surface.
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<emphasis italics="true" pageId="1" pageNumber="54">Vanuatu flat tassel-fern</emphasis>
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.
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</paragraph>
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<caption ID-Zenodo-Dep="1463314" doi="10.3897/phytokeys.109.29359.figure1" httpUri="https://binary.pensoft.net/fig/234053" pageId="1" pageNumber="54" start="Figure 1" startId="F1">
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<paragraph pageId="1" pageNumber="54">
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<emphasis bold="true" pageId="1" pageNumber="54">Figure 1.</emphasis>
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<taxonomicName authorityName="A. R. Field" authorityYear="2018" class="Lycopodiopsida" family="Lycopodiaceae" genus="Phlegmariurus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Phlegmariurus vanuatuensis" order="Lycopodiales" pageId="1" pageNumber="54" phylum="Pteridophyta" rank="species" species="vanuatuensis">
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<emphasis italics="true" pageId="1" pageNumber="54">Phlegmariurus vanuatuensis</emphasis>
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</taxonomicName>
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ARF1140:
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<emphasis bold="true" pageId="1" pageNumber="54">A</emphasis>
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habit, leaf arrangement and fertile spikes
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<emphasis bold="true" pageId="1" pageNumber="54">B</emphasis>
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close up of sterile leaf arrangement showing subopposite decussate leaf arrangement and ovate-oval leaves
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<emphasis bold="true" pageId="1" pageNumber="54">C</emphasis>
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close up of fertile spike showing scale like sporophylls and a sporangium. Scale bar: 10 cm (
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<emphasis bold="true" pageId="1" pageNumber="54">A</emphasis>
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); 1 cm (
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<emphasis bold="true" pageId="1" pageNumber="54">B, C</emphasis>
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). Illustration by A.R.Field.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="1" pageNumber="54" type="materials_examined">
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<paragraph pageId="1" pageNumber="54">Additional specimens examined.</paragraph>
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<paragraph pageId="1" pageNumber="54">
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VANUATU: Nouvelles Hebrides, [n.d.],
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<emphasis italics="true" pageId="1" pageNumber="54">M. MacDonald 59</emphasis>
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(P01219315). Ile de
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<normalizedToken originalValue="Pentecôte">Pentecote</normalizedToken>
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, zone axiale: Lalak (cote 520), 15 Sep 1936,
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<emphasis italics="true" pageId="1" pageNumber="54">
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E. Aubert de la
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<normalizedToken originalValue="Rüe">Ruee</normalizedToken>
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s.n.
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</emphasis>
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(P01219311). Vate, 500-600 m, May 1965,
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<emphasis italics="true" pageId="1" pageNumber="54">M. Schmid 188</emphasis>
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(P01222833). Iles Banks, Vanua-Lava, epiphyte en
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<normalizedToken originalValue="forêt">foret</normalizedToken>
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, 600 m, 14 Jun 1983,
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<emphasis italics="true" pageId="1" pageNumber="54">P. Morat 7472</emphasis>
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(P01238484). NW of Efate, unnamed hill N of Trig Point above Narabut camp, occasional epiphyte in forest on summit of hill, 1600 ft [488 m], 5 Jul 1971,
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<emphasis italics="true" pageId="1" pageNumber="54">A.F. Braithwaite RSNH 2040</emphasis>
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(P01219314). S. Erromanga, high epiphyte in forest, 300 ft [91 m], 6 Aug 1971,
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<emphasis italics="true" pageId="1" pageNumber="54">A.F. Braithwaite RSNH 2275</emphasis>
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(P01219309). N. Espiritu Santo, Apouna Valley, epiphytic in forest, 3000 ft [914 m], 1 Sep 1971,
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<emphasis italics="true" pageId="1" pageNumber="54">A.F. Braithwaite RSNH 2355A</emphasis>
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(P01219310). N. Espiritu Santo S.W. Bay, occasional epiphyte in ridge top forest, 1300 ft [396 m], 11 Oct 1971,
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<emphasis italics="true" pageId="1" pageNumber="54">A.F. Braithwaite RSNH 2601</emphasis>
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(P01219312). N. Espiritu Santo S.W. Bay, occasional epiphyte in ridge top forest, 1300 ft [396 m], 11 Oct 1971,
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<emphasis italics="true" pageId="1" pageNumber="54">J. Raynal RSNH 16213</emphasis>
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(P01221002). Erromango epiphyte 300 m, 4 Aug 1971,
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<emphasis italics="true" pageId="1" pageNumber="54">J. Raynal RSNH 16213</emphasis>
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(P01219313). Iles Banks, Vanua-Lava,
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<normalizedToken originalValue="crête">crete</normalizedToken>
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vers, 500 m, 13 Jun 1983,
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<emphasis italics="true" pageId="1" pageNumber="54">J.M. Veillon 5542</emphasis>
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(P01253017).
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<normalizedToken originalValue="Pentecôte">Pentecote</normalizedToken>
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, Enkul, 550 m, 28 Sep 1984,
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<emphasis italics="true" pageId="1" pageNumber="54">P. Cabalion 2568</emphasis>
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(P01236864). Mallicolo, SW Bay, entre Lenbongbong et Lendemboi, 25 Sep 1986,
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<emphasis italics="true" pageId="1" pageNumber="54">G. Vourdy 823</emphasis>
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(P01238278). Efate,
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<emphasis italics="true" pageId="1" pageNumber="54">M.A. Clements 5640</emphasis>
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(CBG8916282). Cultivated James Cook University ex Efate, 30 Aug 2006,
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<emphasis italics="true" pageId="1" pageNumber="54">A.R. Field 1140</emphasis>
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(BRI, CNS).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="1" pageNumber="54" type="distribution">
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<paragraph pageId="1" pageNumber="54">Distribution, habitat and ecology.</paragraph>
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<paragraph pageId="1" pageNumber="54">Endemic to Vanuatu where it occurs as an uncommon epiphyte on the bark of tree trunks and branches in the canopy to subcanopy of mature trees in lowland to montane primary tropical rainforest.</paragraph>
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</subSubSection>
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<subSubSection pageId="1" pageNumber="54" type="conservation status">
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<paragraph pageId="1" pageNumber="54">Conservation status.</paragraph>
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<paragraph pageId="1" pageNumber="54">
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Vulnerable.
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<taxonomicName authorityName="A. R. Field" authorityYear="2018" class="Lycopodiopsida" family="Lycopodiaceae" genus="Phlegmariurus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Phlegmariurus vanuatuensis" order="Lycopodiales" pageId="1" pageNumber="54" phylum="Pteridophyta" rank="species" species="vanuatuensis">
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<emphasis italics="true" pageId="1" pageNumber="54">Phlegmariurus vanuatuensis</emphasis>
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</taxonomicName>
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is considered eligible for IUCN listing as Vulnerable (
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<bibRefCitation author="IUCN" journalOrPublisher="IUCN, Gland, Switzerland and Cambridge, UK" pageId="7" pageNumber="60" refId="B19" refString="IUCN, 2012. IUCN Red List Categories and Criteria: Version 3.1. Second edition. IUCN, Gland, Switzerland and Cambridge, UK" title="IUCN Red List Categories and Criteria: Version 3.1. Second edition." year="2012">IUCN 2012</bibRefCitation>
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) on the basis of its Area of Occupancy being less than 20,000 km2. Its EOO was calculated at EOO 34,668 km2 and the AOO at 800 km2 using the GeoCAT tool. In addition, it meets criteria A.1.c. as it has experienced a catastrophic reduction in numbers and in particular loss of its intact rainforest canopy habitat following Tropical Cyclone Pam in 2015. It is also considered eligible for listing as Vulnerable on the basis of criteria B.1.a. as it has severely fragmented population scattered over disjunct islands, and is estimated to occur at fewer than 10 locations. In addition, it meets criterion B.1.b. (v & iv) as it is inferred to have experienced, and continue to experience an ongoing decline in the extent and quality of habitat and number of locations or subpopulations and number of mature individuals owing to land clearing of its habitat, and in particular owing to destruction of its habitat by severe tropical cyclones. In addition, the uniqueness of this species may make it a target for rare plant collectors.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="1" pageNumber="54" type="etymology">
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<paragraph pageId="1" pageNumber="54">Etymology.</paragraph>
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<paragraph pageId="1" pageNumber="54">
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Named for the origin of this species in Vanuatu. Vanuatu is a composition of the Austronesian words
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<normalizedToken originalValue="‘Vanua’">
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'
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<emphasis italics="true" pageId="1" pageNumber="54">Vanua</emphasis>
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</normalizedToken>
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' meaning home or land and
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<normalizedToken originalValue="‘Tu’">
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'
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<emphasis italics="true" pageId="1" pageNumber="54">Tu</emphasis>
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</normalizedToken>
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' meaning stand.
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</paragraph>
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</subSubSection>
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<subSubSection lastPageId="2" lastPageNumber="55" pageId="1" pageNumber="54" type="notes">
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<paragraph pageId="1" pageNumber="54">Note.</paragraph>
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<paragraph lastPageId="2" lastPageNumber="55" pageId="1" pageNumber="54">
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<taxonomicName authorityName="A. R. Field" authorityYear="2018" class="Lycopodiopsida" family="Lycopodiaceae" genus="Phlegmariurus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Phlegmariurus vanuatuensis" order="Lycopodiales" pageId="1" pageNumber="54" phylum="Pteridophyta" rank="species" species="vanuatuensis">
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<emphasis italics="true" pageId="1" pageNumber="54">Phlegmariurus vanuatuensis</emphasis>
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</taxonomicName>
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is closely related to
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<taxonomicName lsidName="P. nummulariifolius" pageId="1" pageNumber="54" rank="species" species="nummulariifolius">
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<emphasis italics="true" pageId="1" pageNumber="54">P. nummulariifolius</emphasis>
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</taxonomicName>
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and has been hitherto included in that species. It appears to be the easternmost allopatric species of the
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<taxonomicName lsidName="P. nummulariifolius" pageId="1" pageNumber="54" rank="species" species="nummulariifolius">
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<emphasis italics="true" pageId="1" pageNumber="54">P. nummulariifolius</emphasis>
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</taxonomicName>
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group, differing in several stable morphological characters. Living plants of both species are more distinct than pressed material (Figure
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<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Phlegmariurus nummulariifolius ARF 0002: A basal region of shoot showing branching pattern and leaf arrangement B medial region of shoot showing adpressed leaf arrangement in facial and lateral view C distal region of shoot showing abrupt transition to sporophylls and filiform fertile spikes. Phlegmariurus vanuatuensis ARF 1140 D basal region of shoot showing branching pattern and leaf arrangement E medial region of shoot showing divergent leaf arrangement in facial and lateral view F distal region of shoot showing gradual transition to sporophylls and funiform-filiform fertile spikes. Photos by A. R. Field" figureDoi="10.3897/phytokeys.109.29359.figure2" httpUri="https://binary.pensoft.net/fig/234054" pageId="1" pageNumber="54">2</figureCitation>
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), as the characteristic divergent layered leaf architecture of
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<taxonomicName lsidName="P. vanuatuensis" pageId="1" pageNumber="54" rank="species" species="vanuatuensis">
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<emphasis italics="true" pageId="1" pageNumber="54">P. vanuatuensis</emphasis>
|
||
</taxonomicName>
|
||
is flattened during pressing, the thick fleshy stems collapse and colour is lost during drying (Figure
|
||
<figureCitation captionStart="Figure 2" captionStartId="F2" captionText="Figure 2. Phlegmariurus nummulariifolius ARF 0002: A basal region of shoot showing branching pattern and leaf arrangement B medial region of shoot showing adpressed leaf arrangement in facial and lateral view C distal region of shoot showing abrupt transition to sporophylls and filiform fertile spikes. Phlegmariurus vanuatuensis ARF 1140 D basal region of shoot showing branching pattern and leaf arrangement E medial region of shoot showing divergent leaf arrangement in facial and lateral view F distal region of shoot showing gradual transition to sporophylls and funiform-filiform fertile spikes. Photos by A. R. Field" figureDoi="10.3897/phytokeys.109.29359.figure2" httpUri="https://binary.pensoft.net/fig/234054" pageId="1" pageNumber="54">2</figureCitation>
|
||
). The lower stems of
|
||
<taxonomicName lsidName="P. vanuatuensis" pageId="1" pageNumber="54" rank="species" species="vanuatuensis">
|
||
<emphasis italics="true" pageId="1" pageNumber="54">P. vanuatuensis</emphasis>
|
||
</taxonomicName>
|
||
are thicker, fleshier and light green or pale stramineous brown compared to
|
||
<taxonomicName lsidName="P. nummulariifolius" pageId="1" pageNumber="54" rank="species" species="nummulariifolius">
|
||
<emphasis italics="true" pageId="1" pageNumber="54">P. nummulariifolius</emphasis>
|
||
</taxonomicName>
|
||
which has stems that are more slender, dark purplish brown and more lignified. The sterile leaves of
|
||
<taxonomicName lsidName="P. vanuatuensis" pageId="1" pageNumber="54" rank="species" species="vanuatuensis">
|
||
<emphasis italics="true" pageId="1" pageNumber="54">P. vanuatuensis</emphasis>
|
||
</taxonomicName>
|
||
are acutely spreading,
|
||
<pageBreakToken pageId="2" pageNumber="55" start="start">twisting</pageBreakToken>
|
||
slightly and being almost amplexicaule at their base compared with the tightly adpressed and uniformly planar flat leaves of
|
||
<taxonomicName lsidName="P. nummulariifolius" pageId="2" pageNumber="55" rank="species" species="nummulariifolius">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. nummulariifolius</emphasis>
|
||
</taxonomicName>
|
||
. The leaf colour of
|
||
<taxonomicName lsidName="P. vanuatuensis" pageId="2" pageNumber="55" rank="species" species="vanuatuensis">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. vanuatuensis</emphasis>
|
||
</taxonomicName>
|
||
is usually a bright green whereas in
|
||
<taxonomicName lsidName="P. nummulariifolius" pageId="2" pageNumber="55" rank="species" species="nummulariifolius">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. nummulariifolius</emphasis>
|
||
</taxonomicName>
|
||
it is usually a dark green. The fertile spikes of
|
||
<taxonomicName lsidName="P. vanuatuensis" pageId="2" pageNumber="55" rank="species" species="vanuatuensis">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. vanuatuensis</emphasis>
|
||
</taxonomicName>
|
||
are funiform and relatively unbranched compared with being filiform and multibranched in
|
||
<taxonomicName lsidName="P. nummulariifolius" pageId="2" pageNumber="55" rank="species" species="nummulariifolius">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. nummulariifolius</emphasis>
|
||
</taxonomicName>
|
||
. The transition from sterile to fertile spikes is more gradual than for
|
||
<taxonomicName lsidName="P. nummulariifolius" pageId="2" pageNumber="55" rank="species" species="nummulariifolius">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. nummulariifolius</emphasis>
|
||
</taxonomicName>
|
||
. Young plants of both species are very similar but can usually be differentiated on the basis of leaf divergence.
|
||
</paragraph>
|
||
<paragraph pageId="2" pageNumber="55">
|
||
The diagnostic traits of
|
||
<taxonomicName authorityName="A. R. Field" authorityYear="2018" class="Lycopodiopsida" family="Lycopodiaceae" genus="Phlegmariurus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Phlegmariurus vanuatuensis" order="Lycopodiales" pageId="2" pageNumber="55" phylum="Pteridophyta" rank="species" species="vanuatuensis">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">Phlegmariurus vanuatuensis</emphasis>
|
||
</taxonomicName>
|
||
appear to be consistent across its population whereas the traits of
|
||
<taxonomicName authorityName="Ching, Acta Bot. Yunnan. 4 (2): 125" authorityYear="1982" baseAuthorityName="Blume" class="Lycopodiopsida" family="Lycopodiaceae" genus="Phlegmariurus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Phlegmariurus nummulariifolius" order="Lycopodiales" pageId="2" pageNumber="55" phylum="Pteridophyta" rank="species" species="nummulariifolius">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">Phlegmariurus nummulariifolius</emphasis>
|
||
</taxonomicName>
|
||
appear to be consistent throughout its Malesian, New Guinean and Solomon Island range with plants as close as the Santa Cruz Islands typical of
|
||
<taxonomicName lsidName="P. nummulariifolius" pageId="2" pageNumber="55" rank="species" species="nummulariifolius">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. nummulariifolius</emphasis>
|
||
</taxonomicName>
|
||
. It is expected that
|
||
<taxonomicName lsidName="P. vanuatuensis" pageId="2" pageNumber="55" rank="species" species="vanuatuensis">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. vanuatuensis</emphasis>
|
||
</taxonomicName>
|
||
has dispersed eastward from
|
||
<taxonomicName lsidName="P. nummulariifolius" pageId="2" pageNumber="55" rank="species" species="nummulariifolius">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. nummulariifolius</emphasis>
|
||
</taxonomicName>
|
||
, or a shared ancestor, but has become isolated in the islands Vanuatu leading to allopatric divergence there. Alternatively, it could have colonized Vanuatu and hybridized with
|
||
<taxonomicName lsidName="P. phlegmarioides" pageId="2" pageNumber="55" rank="species" species="phlegmarioides">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. phlegmarioides</emphasis>
|
||
</taxonomicName>
|
||
, as it also shares some traits with that species such as the divergent leaf planes, layered arching branches and the thicker stems and fertile spikes.
|
||
</paragraph>
|
||
<paragraph pageId="2" pageNumber="55">
|
||
<taxonomicName authorityName="A. R. Field" authorityYear="2018" class="Lycopodiopsida" family="Lycopodiaceae" genus="Phlegmariurus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Phlegmariurus vanuatuensis" order="Lycopodiales" pageId="2" pageNumber="55" phylum="Pteridophyta" rank="species" species="vanuatuensis">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">Phlegmariurus vanuatuensis</emphasis>
|
||
</taxonomicName>
|
||
can be readily differentiated from
|
||
<taxonomicName lsidName="P. delbrueckii" pageId="2" pageNumber="55" rank="species" species="delbrueckii">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. delbrueckii</emphasis>
|
||
</taxonomicName>
|
||
(Herter) A.R.Field & Bostock by its larger size, and by having terete fertile spikes rather than the quadrangular fertile spikes found in
|
||
<taxonomicName lsidName="P. delbrueckii" pageId="2" pageNumber="55" rank="species" species="delbrueckii">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. delbrueckii</emphasis>
|
||
</taxonomicName>
|
||
. It can be readily distinguished from
|
||
<taxonomicName lsidName="P. phlegmarioides" pageId="2" pageNumber="55" rank="species" species="phlegmarioides">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. phlegmarioides</emphasis>
|
||
</taxonomicName>
|
||
by its leaves being supine and somewhat more flattened in one plane, rather than radiating in four planar ranks as found in
|
||
<taxonomicName lsidName="P. phlegmarioides" pageId="2" pageNumber="55" rank="species" species="phlegmarioides">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. phlegmarioides</emphasis>
|
||
</taxonomicName>
|
||
. Another species occurring further east in Polynesia,
|
||
<taxonomicName lsidName="P. ribourtii" pageId="2" pageNumber="55" rank="species" species="ribourtii">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. ribourtii</emphasis>
|
||
</taxonomicName>
|
||
(Herter) A.R.Field & Bostock has thicker and distinctly quadrangular fertile spikes and more lingulate-oval leaves with a different arrangement.
|
||
</paragraph>
|
||
<paragraph pageId="2" pageNumber="55">
|
||
<taxonomicName authorityName="A. R. Field" authorityYear="2018" class="Lycopodiopsida" family="Lycopodiaceae" genus="Phlegmariurus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Phlegmariurus vanuatuensis" order="Lycopodiales" pageId="2" pageNumber="55" phylum="Pteridophyta" rank="species" species="vanuatuensis">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">Phlegmariurus vanuatuensis</emphasis>
|
||
</taxonomicName>
|
||
is remarkably convergent with the unrelated broad leafed form of
|
||
<taxonomicName lsidName="P. obtusifolius" pageId="2" pageNumber="55" rank="species" species="obtusifolius">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. obtusifolius</emphasis>
|
||
</taxonomicName>
|
||
(P.Beav.) A.R.Field & Bostock
|
||
<emphasis italics="true" pageId="2" pageNumber="55">s.l.</emphasis>
|
||
[=
|
||
<taxonomicName lsidName="P. pachyphyllus" pageId="2" pageNumber="55" rank="species" species="pachyphyllus">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">P. pachyphyllus</emphasis>
|
||
</taxonomicName>
|
||
(Kuhn ex Herter) A.R.Field & Testo
|
||
<emphasis italics="true" pageId="2" pageNumber="55">s.s.</emphasis>
|
||
] which occurs in a similar habitat in Madagascar and islands of the West Indian Ocean. Together, these species repeat a general trend in which several unrelated species of
|
||
<taxonomicName class="Lycopodiopsida" family="Lycopodiaceae" genus="Phlegmariurus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Phlegmariurus" order="Lycopodiales" pageId="2" pageNumber="55" phylum="Pteridophyta" rank="genus">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">Phlegmariurus</emphasis>
|
||
</taxonomicName>
|
||
occurring epiphytically in lower altitudes of offshore oceanic islands have broader leaves with rounded apices.
|
||
</paragraph>
|
||
<caption ID-Zenodo-Dep="1463316" doi="10.3897/phytokeys.109.29359.figure2" httpUri="https://binary.pensoft.net/fig/234054" pageId="2" pageNumber="55" start="Figure 2" startId="F2">
|
||
<paragraph pageId="2" pageNumber="55">
|
||
<emphasis bold="true" pageId="2" pageNumber="55">Figure 2.</emphasis>
|
||
<taxonomicName authorityName="Ching, Acta Bot. Yunnan. 4 (2): 125" authorityYear="1982" baseAuthorityName="Blume" class="Lycopodiopsida" family="Lycopodiaceae" genus="Phlegmariurus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Phlegmariurus nummulariifolius" order="Lycopodiales" pageId="2" pageNumber="55" phylum="Pteridophyta" rank="species" species="nummulariifolius">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">Phlegmariurus nummulariifolius</emphasis>
|
||
</taxonomicName>
|
||
ARF0002:
|
||
<emphasis bold="true" pageId="2" pageNumber="55">A</emphasis>
|
||
basal region of shoot showing branching pattern and leaf arrangement
|
||
<emphasis bold="true" pageId="2" pageNumber="55">B</emphasis>
|
||
medial region of shoot showing adpressed leaf arrangement in facial and lateral view
|
||
<emphasis bold="true" pageId="2" pageNumber="55">C</emphasis>
|
||
distal region of shoot showing abrupt transition to sporophylls and filiform fertile spikes.
|
||
<taxonomicName authorityName="A. R. Field" authorityYear="2018" class="Lycopodiopsida" family="Lycopodiaceae" genus="Phlegmariurus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Phlegmariurus vanuatuensis" order="Lycopodiales" pageId="2" pageNumber="55" phylum="Pteridophyta" rank="species" species="vanuatuensis">
|
||
<emphasis italics="true" pageId="2" pageNumber="55">Phlegmariurus vanuatuensis</emphasis>
|
||
</taxonomicName>
|
||
ARF1140
|
||
<emphasis bold="true" pageId="2" pageNumber="55">D</emphasis>
|
||
basal region of shoot showing branching pattern and leaf arrangement
|
||
<emphasis bold="true" pageId="2" pageNumber="55">E</emphasis>
|
||
medial region of shoot showing divergent leaf arrangement in facial and lateral view
|
||
<emphasis bold="true" pageId="2" pageNumber="55">F</emphasis>
|
||
distal region of shoot showing gradual transition to sporophylls and funiform-filiform fertile spikes. Photos by A.R.Field
|
||
</paragraph>
|
||
</caption>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |