Selaginella arenicola subsp. riddellii

(Van Eseltine) R. M. Tryon

Ann. Missouri Bot. Gard. 42: 24. 1955.

Common names: Riddell's spike-moss
Endemic
Basionym: Selaginella riddellii Contr. U.S. Natl. Herb. 20: 162. 1918
Treatment appears in FNA Volume 2.

Leaves (aerial stems) usually loosely appressed; base often glabrescent. Strobili sometimes with apical vegetative growth, not distinctly larger than subtending stem. Sporophylls usually not abruptly tapering toward apex; apex straight.


Habitat: Mostly on granite outcrops, granite boulders, or gravelly or sandy soil
Elevation: 0–200 m

Distribution

V2 355-distribution-map.gif

Ala., Ark., Ga., La., Okla., Tex.

Discussion

The specimens of Selaginella arenicola subsp. riddellii from Texas are more constant in their morphologic characteristics and thus more easily separated from subsp. arenicola.

Selected References

None.

Lower Taxa

None.
Iván A. Valdespino +
(Van Eseltine) R. M. Tryon +
Selaginella riddellii +
Riddell's spike-moss +
Ala. +, Ark. +, Ga. +, La. +, Okla. +  and Tex. +
0–200 m +
Mostly on granite outcrops, granite boulders, or gravelly or sandy soil +
Ann. Missouri Bot. Gard. +
Selaginella arenicola subsp. riddellii +
Selaginella arenicola +
subspecies +