View source for Syntrichia obtusissima

{{Treatment/ID
|accepted_name=Syntrichia obtusissima
|accepted_authority=(Müller Hal.) R. H. Zander
|publications={{Treatment/Publication
|title=Bull. Buffalo Soc. Nat. Sci.
|place=32: 269. 1993,
}}
|basionyms={{Treatment/ID/Basionym
|name=Barbula obtusissima
|authority=Müller Hal.
|publication_title=Syn. Musc. Frond.
|publication_place=1: 640. 1849
}}
|synonyms={{Treatment/ID/Synonym
|name=Tortula obtusissima
|authority=(Müller Hal.) Mitten
}}
|hierarchy=Pottiaceae;Pottiaceae subfam. Pottioideae;Syntrichia;Syntrichia obtusissima
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Pottiaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Pottiaceae subfam. Pottioideae]]</div><div class="higher-taxon"><small>genus</small>[[Syntrichia]]</div><div class="higher-taxon"><small>species</small>[[Syntrichia obtusissima]]</div></div>
|volume=Volume 27
|mention_page=page 619, 625, 627
|treatment_page=page 624
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>(5–)10–20 mm. <b>Leaves</b> clasping at base, infolded, and twisted around the stem when dry, wide-spreading to squarrose when moist, lingulate to spatulate, 3–4 × 1–1.5 mm, keeled; margins revolute in the proximal 3/4–7/8, entire, often laxly undulate; apices emarginate to retuse, occasionally truncate or acute; costa excurrent into a toothed, hyaline awn (often brown at base) usually longer than the leaf, yellow or brown, often minutely papillose abaxially (but not serrate because of projecting cell ends); basal cells abruptly differentiated, rectangular, 70–90(–100) × 22–40 µm, often with yellow walls, narrowly rectangular at the margins; distal cells quadrate to polygonal, 15–23 µm, thin-walled, pellucid, bulging and bearing 4–7 papillae per cell. <b>Specialized</b> asexual reproduction absent. <b>Sexual</b> condition autoicous, although perigonia often lacking, apparently sometimes dioicous. <b>Seta</b> red-brown, 10–15 mm. <b>Capsule</b> yellowish or reddish brown, 3–4.5 mm, straight or slightly curved, with an abrupt neck; operculum 1.5–2 mm, reddish brown; peristome ca. 1.5 mm, the distal divisions twisted ca. 2 turns, yellow or red, the basal membrane white, 1/3 the total length. <b>Spores</b> 9–16 µm, papillose.</span><!--

-->{{Treatment/Body
|habitat=Soil, rock, rarely the bases of trees
|elevation=moderate to high elevations
|distribution=Ariz.;N.Mex.;Tex.;Mexico;South America (Bolivia;Peru).
|discussion=<p><i>Syntrichia obtusissima</i>, with a distinctive Southwest and Mexican-Andean disjunction, has been much confused with <i>S. ruralis</i>, leading to many misidentified specimens in herbaria, but the large, pellucid leaf cells (about 15–23 µm) contrast with those of <i>S. ruralis</i> (about 8–12 µm), and the back of the costa lacks serrations from projecting cell ends. Furthermore, it has a clear central strand in the stem, and hydroids in the costa, neither of which is found in <i>S. ruralis</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Syntrichia obtusissima
|author=
|authority=(Müller Hal.) R. H. Zander
|rank=species
|parent rank=genus
|synonyms=Tortula obtusissima
|basionyms=Barbula obtusissima
|family=Pottiaceae
|habitat=Soil, rock, rarely the bases of trees
|elevation=moderate to high elevations
|distribution=Ariz.;N.Mex.;Tex.;Mexico;South America (Bolivia;Peru).
|reference=None
|publication title=Bull. Buffalo Soc. Nat. Sci.
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V27/V27_913.xml
|subfamily=Pottiaceae subfam. Pottioideae
|genus=Syntrichia
|species=Syntrichia obtusissima
}}<!--

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