Difference between revisions of "Selaginella asprella"
Smithsonian Misc. Collect. 72: 6. 1920.
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|elevation=900–2700 m | |elevation=900–2700 m | ||
|distribution=Calif.;Mexico in Baja California. | |distribution=Calif.;Mexico in Baja California. | ||
| − | |discussion=<p>Selaginella asprella may be confused with S. leucobryoides particularly because of its readily fragmenting stems.</p><!-- | + | |discussion=<p><i>Selaginella asprella</i> may be confused with <i>S. leucobryoides</i> particularly because of its readily fragmenting stems.</p><!-- |
--><p>Of conservation concern.</p> | --><p>Of conservation concern.</p> | ||
|tables= | |tables= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Selaginella asprella | name=Selaginella asprella | ||
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|authority=Maxon | |authority=Maxon | ||
|rank=species | |rank=species | ||
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|publication year=1920 | |publication year=1920 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_719.xml |
|genus=Selaginella | |genus=Selaginella | ||
|subgenus=Selaginella subg. Tetragonostachys | |subgenus=Selaginella subg. Tetragonostachys | ||
Latest revision as of 20:25, 5 November 2020
Plants on rock or terrestrial, forming cushionlike or loose mats. Stems decumbent to short-creeping, dry stem readily fragmenting, irregularly forking, without budlike arrested branches, tips straight; main stem upperside and underside structurally slightly different, inconspicuously indeterminate, lateral branches radially symmetric, determinate or not, often strongly ascending on cushionlike mats, 1–2-forked. Rhizophores borne on upperside of stems, throughout stem length, 0.2–0.4 mm diam. Leaves monomorphic, in alternate pseudowhorls of 4, tightly appressed, ascending, green, narrowly triangular-lanceolate to linear-lanceolate, (2–)2.5–4 × 0.45–0.7(–0.8) mm (smaller on young buds); abaxial ridges present; base cuneate and decurrent or sometimes rounded and adnate on young buds, pubescent (hairs often covering 1/4 of leaf length abaxially); margins ciliate, cilia transparent to whitish, spreading, 0.7–0.15 mm; apex keeled, attenuate or obtuse, bristled; bristle white or transparent, puberulent, 0.5–1.4 mm. Strobili solitary, 0.4–1.5(–2) cm; sporophylls lanceolate and strongly tapering to apex or deltate-ovate to ovate-lanceolate, abaxial ridges moderately defined, base pubescent or glabrous, margins short-ciliate to dentate, apex keeled or plane, bristled.
Habitat: Limestone ridges, dry rocky slopes, igneous rock, exposed cliffs or gravelly soil
Elevation: 900–2700 m
Distribution
Calif., Mexico in Baja California.
Discussion
Selaginella asprella may be confused with S. leucobryoides particularly because of its readily fragmenting stems.
Of conservation concern.
Selected References
None.