Selaginella cinerascens A.A.Eaton
Descripción
Stems forming compact, cushion-like mats, creeping, not readily fragmenting, slightly dorsiventral, irregularly branched, without bud-like arrested branches, tips straight, main stems ascending, 0.3–0.4 mm diam., not articulate, not flagelliform, not stoloniferous, 1–2 times branched; rhizophores borne throughout stem length, 0.2–0.3 mm diam.; leaves of one kind (isophyllous) throughout stem length, loosely appressed, dull to grayish green, linear to linear-lanceolate (1–)2.5–3 X (0.3–)0.4–0.6 mm (leaves on secondary and tertiary branches smaller), bases rounded and adnate or cuneate and slightly decurrent, glabrous, seldom pubescent, margins denticulate to very shortly ciliate, teeth or cilia hyaline, scattered, acute to slightly acuminate; strobili quadrangular, 2–6 mm long; sporophylls monomorphic; megasporangia few in two ventral rows; microsporangia on two dorsal rows and scattered on ventral rows; megaspores yellow, reticulate, 320–340 µm diam.; microspores orange.A
Forma de vida
TerrestreA
Ejemplar revisado
BCN (Broome et al. 1951, NY; Ferris 8474, DS, NY, US; Johnston 1304, CAS; Montgomery 83-38, NY; Moran 19269, ENCB, LL, UC, 27088, ARIZ, UC; Moran & Reveal 20283, MEXU, MSC; Wiggins 4213, ARIZ, DS, GH, NY, UC, US, 21553, ARIZ, DS, ENCB; Wiggins & Thomas 416, DS).A
Elevación
0 – 350 mA
Ecología y Hábitat
In dry open places, rocky hilltops, clayey-sandy soil, or in shade under shrubs and trees.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
The light brown and grayish mats, short lateral branches, narrow stems, and short strobili distinguish S. cinerascens from all other species in the flora. Selaginella cinerascens is without close relatives in Mexico; R. Tyron (1955) related S. cinerascens to S. arsenei, and it also closely resembles S. nivea Alston from Madagascar.A