View source for Isopterygium tenerum

{{Treatment/ID
|accepted_name=Isopterygium tenerum
|accepted_authority=(Swartz) Mitten
|publications={{Treatment/Publication
|title=J. Linn. Soc., Bot.
|place=12: 499. 1869
|year=1869
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Hypnum tenerum
|authority=Swartz
|rank=species
|publication_title=Fl. Ind. Occid.
|publication_place=3: 1817. 1806
}} {{Treatment/ID/Basionym
|name=Isopterygium drummondii
|authority=H. A. Crum
|rank=species
|publication_title=Steere &amp; L. E. Anderson
|publication_place=
}}
|synonyms={{Treatment/ID/Synonym
|name=H. albulum
|authority=Müller Hal.
|rank=species
}} {{Treatment/ID/Synonym
|name=H. chapmanii
|authority=Duby
|rank=species
}} {{Treatment/ID/Synonym
|name=H. fulvum
|authority=Hooker & Wilson
|rank=species
}} {{Treatment/ID/Synonym
|name=H. micans
|authority=Swartz
|rank=species
}} {{Treatment/ID/Synonym
|name=I. fulvum
|authority=(A. Jaeger) Kindberg
|rank=species
}} {{Treatment/ID/Synonym
|name=I. groutii
|authority=(Cardot & Thériot) Grout
|rank=species
}} {{Treatment/ID/Synonym
|name=I. micans
|authority=(Swartz) Kindberg
|rank=species
}} {{Treatment/ID/Synonym
|name=I. micans var. latifolium
|authority=(Grout) Schornherst
|rank=variety
}} {{Treatment/ID/Synonym
|name=I. micans var. minus
|authority=(Grout) H. A. Crum & L. E. Anderson
|rank=variety
}} {{Treatment/ID/Synonym
|name=Isothecium tenerum
|authority=Cardot & Thériot
|rank=species
}} {{Treatment/ID/Synonym
|name=Plagiothecium fulvum
|authority=(Swartz) Paris
|rank=species
}} {{Treatment/ID/Synonym
|name=P. groutii
|authority=Renauld & Cardot
|rank=species
}} {{Treatment/ID/Synonym
|name=P. micans
|authority=(Swartz) Austin
|rank=species
}} {{Treatment/ID/Synonym
|name=P. micans var. fulvum
|authority=(A. Jaeger) Paris
|rank=variety
}} {{Treatment/ID/Synonym
|name=Rhaphidostegium ludovicianum
|authority=
|rank=species
}} {{Treatment/ID/Synonym
|name=Rhynchostegium micans
|authority=
|rank=species
}}
|hierarchy=Hypnaceae;Isopterygium;Isopterygium tenerum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Hypnaceae]]</div><div class="higher-taxon"><small>genus</small>[[Isopterygium]]</div><div class="higher-taxon"><small>species</small>[[Isopterygium tenerum]]</div></div>
|volume=Volume 28
|mention_page=page 554
|treatment_page=page 553
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>small, in thin to dense mats, whitish to yellowish. <b>Stems</b> to 2(–5) cm, 0.5–1.5(–3) mm wide. <b>Leaves</b> erect-spreading, not or slightly wrinkled when dry, ovate to lanceolate, 0.7–1.8 × 0.2–0.6 mm; margins plane, serrulate to entire proximally, serrate to serrulate distally, rarely entire throughout; alar cells short-rectangular, quadrate, or transversely elongate, 12–38 × 10–20 µm, region small; medial laminal cells often flexuose, linear-fusiform, 52–151 × 5–8 µm. <b>Specialized</b> asexual reproduction sometimes present as filaments on stems, multicellular, green or brown, simple or branched, often more than 0.5 mm, cells papillose. <b>Seta</b> yellow to reddish brown, 0.5–1.5 cm. <b>Capsule</b> cernuous, rarely erect, light brown to orange-brown, 0.5–2 mm; operculum conic-apiculate to obliquely short-rostrate. <b>Spores</b> 9–14 µm.</span><!--

-->{{Treatment/Body
|phenology=Spores 9-14 µm, mature spring–summer.
|habitat=Dry wooded regions, swamps, wet roadside ditches, base of trees, rotten logs, stumps, sandy soil, sedimentary rock
|elevation=low to moderate elevations (0-400 m)
|distribution=N.S.;Ala.;Ark.;Del.;D.C.;Fla.;Ga.;Ky.;La.;Md.;Mass.;Miss.;Mo.;N.J.;N.Y.;N.C.;Ohio;S.C.;Tenn.;Tex.;Va.;Mexico;West Indies;Central America;South America;s Europe (Italy).
|discussion=<p><i>Isopterygium tenerum</i> is common in Florida and the Gulf Coast, becoming infrequent northward, occurring in scattered localities to southern New York and disjunct to southern Nova Scotia. The species is extremely variable, and several varieties have been described from North American plants. These varieties, based on leaf shape and length, are believed to be environmental forms and are therefore included in the synonymy. A biometric analysis by P. L. Redfearn (1956) on the stem leaf variation reached a similar conclusion.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Isopterygium tenerum
|authority=(Swartz) Mitten
|rank=species
|parent rank=genus
|synonyms=H. albulum;H. chapmanii;H. fulvum;H. micans;I. fulvum;I. groutii;I. micans;I. micans var. latifolium;I. micans var. minus;Isothecium tenerum;Plagiothecium fulvum;P. groutii;P. micans;P. micans var. fulvum;Rhaphidostegium ludovicianum;Rhynchostegium micans
|basionyms=Hypnum tenerum;Isopterygium drummondii
|family=Hypnaceae
|phenology=Spores 9-14 µm, mature spring–summer.
|habitat=Dry wooded regions, swamps, wet roadside ditches, base of trees, rotten logs, stumps, sandy soil, sedimentary rock
|elevation=low to moderate elevations (0-400 m)
|distribution=N.S.;Ala.;Ark.;Del.;D.C.;Fla.;Ga.;Ky.;La.;Md.;Mass.;Miss.;Mo.;N.J.;N.Y.;N.C.;Ohio;S.C.;Tenn.;Tex.;Va.;Mexico;West Indies;Central America;South America;s Europe (Italy).
|reference=None
|publication title=J. Linn. Soc., Bot.
|publication year=1869
|special status=Illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V28/V28_860.xml
|genus=Isopterygium
|species=Isopterygium tenerum
}}<!--

-->[[Category:Treatment]][[Category:Isopterygium]]