Difference between revisions of "Selaginella ludoviciana"
Ann. Sci. Nat., Bot. sér. 4, 13: 58. 1860.
Common names: Gulf spike-moss Louisiana spike-moss
Basionym: Lycopodium ludovicianum A. Braun
Synonyms: Diplostachyum ludovicianum (A. Braun) Small
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>terrestrial, forming diffuse mats. <b>Stems</b> long-creeping, usually ascending, sparsely branched, branches mostly simple or 1-forked, flat, not articulate, glabrous. <b>Rhizophores</b> axillary, 0.1–0.2 mm diam. <b>Leaves</b> delicate, papery. <b>Lateral</b> leaves well spaced, green, ovate to ovate-lanceolate, 1.6–2.65 × 0.98–1.64 mm; base slightly cordate; margins transparent, serrate; apex acute to slightly obtuse, conspicuously ending in teeth. <b>Median</b> leaves spaced, ovate-lanceolate to narrowly ovate-lanceolate (on basal stems), 1.3–2 × 0.4–0.8 mm; base oblique on inner side, rounded and prominent on outer side; margins transparent, serrate; apex long-acuminate to bristled. <b>Strobili</b> solitary or paired, lax, flattened, 0.4–0.7(–1.5) cm; sporophylls very strongly keeled, keel dentate, base slightly cordate to rounded, margins transparent, sparsely serrate, apex acuminate; megasporophylls larger and wider than microsporophylls, usually on underside of strobili.</span><!-- |
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|publication year=1860 | |publication year=1860 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna- | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_259.xml |
|genus=Selaginella | |genus=Selaginella | ||
|subgenus=Selaginella subg. Stachygynandrum | |subgenus=Selaginella subg. Stachygynandrum | ||
|species=Selaginella ludoviciana | |species=Selaginella ludoviciana | ||
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Revision as of 14:15, 27 July 2019
Plants terrestrial, forming diffuse mats. Stems long-creeping, usually ascending, sparsely branched, branches mostly simple or 1-forked, flat, not articulate, glabrous. Rhizophores axillary, 0.1–0.2 mm diam. Leaves delicate, papery. Lateral leaves well spaced, green, ovate to ovate-lanceolate, 1.6–2.65 × 0.98–1.64 mm; base slightly cordate; margins transparent, serrate; apex acute to slightly obtuse, conspicuously ending in teeth. Median leaves spaced, ovate-lanceolate to narrowly ovate-lanceolate (on basal stems), 1.3–2 × 0.4–0.8 mm; base oblique on inner side, rounded and prominent on outer side; margins transparent, serrate; apex long-acuminate to bristled. Strobili solitary or paired, lax, flattened, 0.4–0.7(–1.5) cm; sporophylls very strongly keeled, keel dentate, base slightly cordate to rounded, margins transparent, sparsely serrate, apex acuminate; megasporophylls larger and wider than microsporophylls, usually on underside of strobili.
Habitat: Swamps, stream banks, ditch banks, or moist ravines of calcareous ledges
Elevation: 0–50 m
Distribution
Ala., Fla., Ga., La., Miss.
Discussion
Among the species in the flora, Selaginella ludoviciana is most closely related to S. apoda (see discussion) and has often been included in S. apoda. W. R. Buck and T. W. Lucansky (1976) concluded that two species should be recognized based on anatomic and morphologic data. A close examination of distribution of sporangia in the strobili in many specimens reveals that sporangial arrangement may be more variable than reported by H. T. Horner Jr. and H. J. Arnott (1963). All species in the S. apoda complex (see S. apoda and S. eclipes for discussion on the complex) have sporophylls with fused blade tissue.
Selected References
None.
Lower Taxa
None.