View source for Selaginella underwoodii

{{Treatment/ID
|accepted_name=Selaginella underwoodii
|accepted_authority=Hieronymus in Engler & Prantl
|publications={{Treatment/Publication
|title=in Engler & Prantl,Nat. Pflanzenfam.
|place=1: 714. 1901
|year=1901
}}
|common_names=Underwood's spike-moss
|basionyms={{Treatment/ID/Basionym
|name=Selaginella fendleri
|authority=(L. Underwood) Hieronymus
|rank=species
|publication_title=
|publication_place=1900,
}}
|synonyms=
|hierarchy=Selaginellaceae;Selaginella;Selaginella subg. Tetragonostachys;Selaginella underwoodii
|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 underwoodii]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>on rock, forming loose festoonlike mats or rarely compact mats. <b>Stems</b> radially symmetric, long-creeping, short-creeping, or pendent, not readily fragmenting, irregularly forked, without budlike arrested branches, tips straight; main stem indeterminate, lateral branches determinate, spreading, 1–2-forked. <b>Rhizophores</b> borne on upperside of stems, throughout stem length, 0.15–0.27(–0.3) mm diam. <b>Leaves</b> monomorphic, in alternate pseudowhorls of 4 (on main stem and older lateral branches) or 3 (on young lateral branches and secondary branches), loosely appressed, ascending, green, linear to linear-lanceolate or narrowly triangular-lanceolate, (2–)2.5–3.4 × 0.45–0.5(–0.7) mm; abaxial ridges prominent; base mostly cuneate and decurrent, rarely rounded and adnate (on young branches), pubescent or glabrous; margins entire to denticulate or very short-ciliate, cilia transparent, scattered, mostly ascending, dentiform toward apex, 0.02–0.07 mm; apex keeled, slightly attenuate, short- to long-bristled; bristle transparent greenish to greenish-yellowish, rarely white, smooth, seldom slightly puberulent, sometimes breaking off, 0.25–0.7(–1) mm. <b>Strobili</b> sometimes paired, 0.5–3.5 cm; sporophylls lanceolate to ovate-lanceolate, abaxial ridges prominent, base glabrous, with prominent auricles (no other species has such prominent auricles), margins entire or very short-ciliate to denticulate, apex keeled, short- to long-bristled.</span><!--

-->{{Treatment/Body
|habitat=Moist or shaded cliffs, rocky slopes, rock crevices, granitic outcrops, hanging over granite cliffs, sandstone or limestone ledges
|elevation=(800–)1500–3000(–4000) m
|distribution=Ariz.;Colo.;N.Mex.;Okla.;Tex.;Utah;Wyo.;Mexico in Chihuahua and Nuevo León.
|discussion=<p>R. M. Tryon (1971) reported that the bristle on <i>Selaginella underwoodii</i> leaves is longer (to 1.44 mm) in the southern part of the range and shorter (to 0.43 mm) northward and in central Arizona. <i>Selaginella underwoodii</i> seems to be closely related to <i>S. oregana</i>, perhaps sharing a common ancestor.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Selaginella underwoodii
|authority=Hieronymus in Engler & Prantl
|rank=species
|parent rank=subgenus
|synonyms=
|basionyms=Selaginella fendleri
|family=Selaginellaceae
|habitat=Moist or shaded cliffs, rocky slopes, rock crevices, granitic outcrops, hanging over granite cliffs, sandstone or limestone ledges
|elevation=(800–)1500–3000(–4000) m
|distribution=Ariz.;Colo.;N.Mex.;Okla.;Tex.;Utah;Wyo.;Mexico in Chihuahua and Nuevo León.
|reference=None
|publication title=in Engler & Prantl,Nat. Pflanzenfam.
|publication year=1901
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V2/V2_58.xml
|genus=Selaginella
|subgenus=Selaginella subg. Tetragonostachys
|species=Selaginella underwoodii
}}<!--

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