View source for Hypnum subimponens

{{Treatment/ID
|accepted_name=Hypnum subimponens
|accepted_authority=Lesquereux
|publications={{Treatment/Publication
|title=Trans. Amer. Philos. Soc. n. s.
|place=13: 14. 1865
|year=1865
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Stereodon subimponens
|authority=(Lesquereux) Brotherus
}}
|hierarchy=Hypnaceae;Hypnum;Hypnum subimponens
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Hypnaceae]]</div><div class="higher-taxon"><small>genus</small>[[Hypnum]]</div><div class="higher-taxon"><small>species</small>[[Hypnum subimponens]]</div></div>
|volume=Volume 28
|mention_page=page 533
|treatment_page=page 548
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>medium-sized, not in tufts, pale yellow-green to golden green. <b>Stems</b> 2–10 cm, yellowish to pale green, creeping, not complanate-foliate, regularly and closely pinnate to plumose, branches 0.2–1.5 cm; hyalodermis present, central strand weak or absent; pseudoparaphyllia foliose. <b>Stem</b> leaves circinate-secund, ovate-lanceolate, gradually tapering to insertion, gradually narrowed to apex, 1.5–2.8 × 0.4–0.6 mm; base not decurrent; margins plane, sinuate proximally, serrate toward apex; apex narrowly acuminate; costa double, short, indistinct, less than 1/3 leaf length; alar region slightly differentiated, of 3 or 4 cells at extreme basal angles; basal laminal cells shorter, broader than medial cells, not strongly pigmented, walls pitted; medial cells 50–80(–90) × 3–4 µm. <b>Sexual</b> condition dioicous; inner perichaetial leaves lanceolate, weakly or not plicate, margins slightly toothed or entire near apex. <b>Seta</b> red-brown, 2.5–3 cm. <b>Capsule</b> erect to suberect, light brown, cylindric, 3–5 mm; annulus 1–3-seriate; operculum conic or rostellate; endostome cilia unknown.</span><!--

-->{{Treatment/Body
|phenology=Capsules mature May–Jun.
|habitat=Epiphytic on living trees, cliffs, vertical rock faces, decaying logs, terrestrial
|elevation=low to moderate elevations (0-1500 m)
|distribution=B.C.;N.W.T.;Nunavut;Yukon;Alaska;Calif.;Idaho;Mont.;Oreg.;Wash.;e Asia.
|discussion=<p>Specimens of <i>Hypnum subimponens</i> from Arctic regions are problematic; in fact, any specimens from horizontal surfaces can be difficult to place accurately. Sporophytes, produced in spring, are frequent only on vertical surfaces and then often abundant. Unlike similar species in western North America, <i>H. subimponens</i> produces cylindric, erect capsules (slightly curved below the mouth when mature). <i>Hypnum lindbergii</i> has falcate-secund leaves, while those in <i>H. subimponens</i> are circinate-secund to strongly hamate. Key traits of the stem leaves separate <i>H. subimponens</i> from <i>H. hamulosum</i>, and the former is usually more than twice the size of the latter. See also discussions of 3. <i>H. callichroum</i>, 11. <i>H. holmenii</i>, and 16. <i>H. plicatulum</i>. Plants of <i>H. subimponens</i> have branches 0.5–1 mm wide; the alar cells are slightly bulging, hyaline, and thin-walled.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Hypnum subimponens
|author=
|authority=Lesquereux
|rank=species
|parent rank=genus
|synonyms=Stereodon subimponens
|basionyms=
|family=Hypnaceae
|phenology=Capsules mature May–Jun.
|habitat=Epiphytic on living trees, cliffs, vertical rock faces, decaying logs, terrestrial
|elevation=low to moderate elevations (0-1500 m)
|distribution=B.C.;N.W.T.;Nunavut;Yukon;Alaska;Calif.;Idaho;Mont.;Oreg.;Wash.;e Asia.
|reference=None
|publication title=Trans. Amer. Philos. Soc. n. s.
|publication year=1865
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V28/V28_853.xml
|genus=Hypnum
|species=Hypnum subimponens
}}<!--

-->[[Category:Treatment]][[Category:Hypnum]]