View source for Selaginella watsonii

{{Treatment/ID
|accepted_name=Selaginella watsonii
|accepted_authority=L. Underwood
|publications={{Treatment/Publication
|title=Bull. Torrey Bot. Club
|place=25: 127. 1898
|year=1898
}}
|common_names=Alpine spike-moss;Watson's spike-moss
|basionyms=
|synonyms=
|hierarchy=Selaginellaceae;Selaginella;Selaginella subg. Tetragonostachys;Selaginella watsonii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Selaginellaceae]]</div><div class="higher-taxon"><small>genus</small>[[Selaginella]]</div><div class="higher-taxon"><small>subgenus</small>[[Selaginella subg. Tetragonostachys]]</div><div class="higher-taxon"><small>species</small>[[Selaginella watsonii]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>on rock or terrestrial, forming long or compact cushionlike mats. <b>Stems</b> radially symmetric, decumbent to long-creeping, not readily fragmenting, irregularly forked, without budlike arrested branches, tips straight; main stem conspicuously determinate, lateral branches conspicuously or inconspicuously determinate, strongly ascending, 1–3-forked. <b>Rhizophores</b> borne on upperside of stems, throughout stem length, 0.35–0.55 mm diam. <b>Leaves</b> monomorphic, in alternate pseudowhorls of 4, tightly or loosely appressed, ascending, green, linear-lanceolate, (2.5–)3–4 × 0.5–0.7 mm; abaxial ridges prominent; base cuneate, decurrent, glabrous or sometimes pubescent; margins entire or short-ciliate, cilia transparent, scattered, spreading, 0.05–0.1 mm; apex strongly keeled, obtuse, abruptly bristled; bristle whitish to transparent, smooth, 0.25–0.5 mm. <b>Strobili</b> solitary, 0.5–3(–3.5) cm; sporophylls lanceolate to ovate-lanceolate, abaxial ridges well defined, base glabrous, margins entire, rarely dentate, apex strongly keeled to truncate in profile, short-bristled.</span><!--

-->{{Treatment/Body
|habitat=On exposed or shaded cliffs, rocky slopes, rock crevices, granite boulders, quartzite rock, gravelly or sandy soil, alpine meadows, or swampy grounds
|elevation=1800–4300 m
|distribution=Ariz.;Calif.;Idaho;Mont.;Nev.;Oreg.;Utah;Wyo.
|discussion=<p>R. M. Tryon (1955) suggested that <i>Selaginella watsonii</i> is a possible ancestor of (or shares a common ancestor with) <i>S. leucobryoides</i>, <i>S. asprella</i>, and <i>S. utahensis</i> (see discussion).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Selaginella watsonii
|author=
|authority=L. Underwood
|rank=species
|parent rank=subgenus
|synonyms=
|basionyms=
|family=Selaginellaceae
|habitat=On exposed or shaded cliffs, rocky slopes, rock crevices, granite boulders, quartzite rock, gravelly or sandy soil, alpine meadows, or swampy grounds
|elevation=1800–4300 m
|distribution=Ariz.;Calif.;Idaho;Mont.;Nev.;Oreg.;Utah;Wyo.
|reference=None
|publication title=Bull. Torrey Bot. Club
|publication year=1898
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V2/V2_579.xml
|genus=Selaginella
|subgenus=Selaginella subg. Tetragonostachys
|species=Selaginella watsonii
}}<!--

-->[[Category:Treatment]][[Category:Selaginella subg. Tetragonostachys]]