Difference between revisions of "Selaginella arizonica"
Smithsonian Misc. Collect. 72: 5–6. 1920.
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|common_names=Arizona spike-moss | |common_names=Arizona spike-moss | ||
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>on rock or terrestrial, forming rather loose mats. <b>Stems</b> not readily fragmenting, prostrate, upperside and underside structurally different, irregularly forked, branches determinate, tips upturned in extremely dry conditions. <b>Rhizophores</b> borne on upperside of stem throughout, 0.25–0.3 mm diam. <b>Leaves</b> conspicuously dimorphic, in 8 ranks, tightly appressed to ascending, green; abaxial ridges present; apex with transparent to opaque, flattened bristle 0.1–0.3 mm, sometimes becoming acute (by breaking off of bristle). <b>Underside</b> leaves lanceolate, 2–2.5 × 0.5–0.6 mm; base decurrent, glabrous; margins ciliate, cilia transparent to opaque, spreading or ascending, 0.06–0.13 mm. <b>Upperside</b> leaves linear-lanceolate to slightly falcate (on marginal ranks), 1.9–2.25 × 0.4–0.55 mm; base abruptly adnate, pubescent or glabrous; margins ciliate, cilia transparent to opaque, spreading, 0.06–0.15 mm. <b>Strobili</b> solitary, 5–10 mm; sporophylls ovate-deltate, abaxial ridges not prominent, base glabrous, margins short-ciliate to denticulate, apex acute.</span><!-- |
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|elevation=600–2000 m | |elevation=600–2000 m | ||
|distribution=Ariz.;Tex.;Mexico in Baja California;Sonora. | |distribution=Ariz.;Tex.;Mexico in Baja California;Sonora. | ||
| − | |discussion=<p>Selaginella arizonica can be further distinguished from the similar S. peruviana by its broad, thin underside leaves. In S. peruviana the underside leaves are narrow and fleshy.</p> | + | |discussion=<p><i>Selaginella arizonica</i> can be further distinguished from the similar <i>S. peruviana</i> by its broad, thin underside leaves. In <i>S. peruviana</i> the underside leaves are narrow and fleshy.</p> |
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name=Selaginella arizonica | name=Selaginella arizonica | ||
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|authority=Maxon | |authority=Maxon | ||
|rank=species | |rank=species | ||
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|publication title=Smithsonian Misc. Collect. | |publication title=Smithsonian Misc. Collect. | ||
|publication year=1920 | |publication year=1920 | ||
| − | |special status= | + | |special status=Illustrated |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_485.xml |
|genus=Selaginella | |genus=Selaginella | ||
|subgenus=Selaginella subg. Tetragonostachys | |subgenus=Selaginella subg. Tetragonostachys | ||
|species=Selaginella arizonica | |species=Selaginella arizonica | ||
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-->[[Category:Treatment]][[Category:Selaginella subg. Tetragonostachys]] | -->[[Category:Treatment]][[Category:Selaginella subg. Tetragonostachys]] | ||
Latest revision as of 21:23, 5 November 2020
Plants on rock or terrestrial, forming rather loose mats. Stems not readily fragmenting, prostrate, upperside and underside structurally different, irregularly forked, branches determinate, tips upturned in extremely dry conditions. Rhizophores borne on upperside of stem throughout, 0.25–0.3 mm diam. Leaves conspicuously dimorphic, in 8 ranks, tightly appressed to ascending, green; abaxial ridges present; apex with transparent to opaque, flattened bristle 0.1–0.3 mm, sometimes becoming acute (by breaking off of bristle). Underside leaves lanceolate, 2–2.5 × 0.5–0.6 mm; base decurrent, glabrous; margins ciliate, cilia transparent to opaque, spreading or ascending, 0.06–0.13 mm. Upperside leaves linear-lanceolate to slightly falcate (on marginal ranks), 1.9–2.25 × 0.4–0.55 mm; base abruptly adnate, pubescent or glabrous; margins ciliate, cilia transparent to opaque, spreading, 0.06–0.15 mm. Strobili solitary, 5–10 mm; sporophylls ovate-deltate, abaxial ridges not prominent, base glabrous, margins short-ciliate to denticulate, apex acute.
Habitat: In rock crevices or on gravel, on sandstone, igneous, or rarely limestone substrates
Elevation: 600–2000 m
Distribution
Ariz., Tex., Mexico in Baja California, Sonora.
Discussion
Selaginella arizonica can be further distinguished from the similar S. peruviana by its broad, thin underside leaves. In S. peruviana the underside leaves are narrow and fleshy.
Selected References
None.
Lower Taxa
None.