Difference between revisions of "Selaginella eremophila"
Smithsonian Misc. Collect. 72: 3–5. 1920.
Common names: Desert spike-moss
Treatment appears in FNA Volume 2.
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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 dense mats. <b>Stems</b> not readily fragmenting, prostrate, upperside and underside structurally different, irregularly forked; branches determinate, tips upturned. <b>Rhizophores</b> borne on upperside of stems, throughout stem length, 0.2 mm diam. <b>Leaves</b> conspicuously dimorphic, in 8 ranks, tightly appressed, ascending, green; abaxial ridges present; apex with deciduous, twisted, transparent bristle ± 0.3 mm, becoming acute to slightly mucronate in oldest branches. <b>Underside</b> leaves lanceolate to lanceolate-elliptic (on central ranks) or falcate (on marginal ranks), 2–2.7 × 0.5–0.7 mm; base decurrent, glabrous; margins ciliate, cilia transparent to opaque, spreading, 0.04–0.1 mm. <b>Upperside</b> leaves lanceolate, 1.3–1.4 × 0.3–0.4 mm; base abruptly adnate, pubescent, hairs often running along groove; margins ciliate, cilia transparent to opaque, spreading, ca. 0.1 mm. <b>Strobili</b> solitary, 3–8 mm; sporophylls ovate-deltate, abaxial ridges not prominent, base glabrous, margins ciliate, apex acute to mucronate.</span><!-- |
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|elevation=130–1000 m | |elevation=130–1000 m | ||
|distribution=Ariz.;Calif.;Mexico in Baja California. | |distribution=Ariz.;Calif.;Mexico in Baja California. | ||
| − | |discussion=<p>Selaginella eremophila is most closely related to the Mexican S. parishii L. Underwood and S. landii Greenman & Pfeiffer. In S. eremophila and the following two species, S. arizonica and S. peruviana, the leaves are arranged in 8 conspicuous ranks: 3 underside (2 marginal, 1 central), 2 lateral, and 3 upperside (2 marginal, 1 central).</p> | + | |discussion=<p><i>Selaginella eremophila</i> is most closely related to the Mexican <i>S. parishii</i> L. Underwood and S. landii Greenman & Pfeiffer. In <i>S. eremophila</i> and the following two species, <i>S. arizonica</i> and <i>S. peruviana</i>, the leaves are arranged in 8 conspicuous ranks: 3 underside (2 marginal, 1 central), 2 lateral, and 3 upperside (2 marginal, 1 central).</p> |
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name=Selaginella eremophila | name=Selaginella eremophila | ||
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|publication year=1920 | |publication year=1920 | ||
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| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_251.xml |
|genus=Selaginella | |genus=Selaginella | ||
|subgenus=Selaginella subg. Tetragonostachys | |subgenus=Selaginella subg. Tetragonostachys | ||
|species=Selaginella eremophila | |species=Selaginella eremophila | ||
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Latest revision as of 20:22, 5 November 2020
Plants on rock or terrestrial, forming dense mats. Stems not readily fragmenting, prostrate, upperside and underside structurally different, irregularly forked; branches determinate, tips upturned. Rhizophores borne on upperside of stems, throughout stem length, 0.2 mm diam. Leaves conspicuously dimorphic, in 8 ranks, tightly appressed, ascending, green; abaxial ridges present; apex with deciduous, twisted, transparent bristle ± 0.3 mm, becoming acute to slightly mucronate in oldest branches. Underside leaves lanceolate to lanceolate-elliptic (on central ranks) or falcate (on marginal ranks), 2–2.7 × 0.5–0.7 mm; base decurrent, glabrous; margins ciliate, cilia transparent to opaque, spreading, 0.04–0.1 mm. Upperside leaves lanceolate, 1.3–1.4 × 0.3–0.4 mm; base abruptly adnate, pubescent, hairs often running along groove; margins ciliate, cilia transparent to opaque, spreading, ca. 0.1 mm. Strobili solitary, 3–8 mm; sporophylls ovate-deltate, abaxial ridges not prominent, base glabrous, margins ciliate, apex acute to mucronate.
Habitat: Rocky and sandy slopes, in open rock or crevices or in soil
Elevation: 130–1000 m
Distribution
Ariz., Calif., Mexico in Baja California.
Discussion
Selaginella eremophila is most closely related to the Mexican S. parishii L. Underwood and S. landii Greenman & Pfeiffer. In S. eremophila and the following two species, S. arizonica and S. peruviana, the leaves are arranged in 8 conspicuous ranks: 3 underside (2 marginal, 1 central), 2 lateral, and 3 upperside (2 marginal, 1 central).
Selected References
None.
Lower Taxa
None.