Cheilanthes horridula Maxon
Descripción
Rhizomes compact, horizontal, 2–3 mm diam.; rhizome scales linear-lanceolate, concolorous orange-brown or weakly bicolorous, ca. 3 mm long, entire; fronds 10–35 cm long, clumped; stipes 1⁄4–1⁄3 the frond length, black to dark brown, terete, with scattered linear-lanceolate scales 1–2 mm long, and dimorphic hairs, abaxially hairs 1 mm long, adaxially hairs 0.1 mm long, tortuous, appressed; blades linear-oblong to lanceolate, pinnate-pinnatifid to bipinnate, 1–4 cm wide; pinnae 10–15 pairs, equilateral; abaxial scales of costae lanceolate, truncate to subcordate at bases, loosely imbricate, not concealing ultimate segments, entire to slightly toothed; ultimate segments narrowly elliptic to elongatedeltate, not bead-like, the largest 3–5 mm long; adaxial surfaces scabrous with stiff, pustulate hairs; abaxial surfaces with nonpustulate hairs; laminar margins curved, not differentiated, sori continuous along segment margins; sporangia 64-spored; spores tan; 2n=58, 116 (NL, USA).
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Forma de vida
Rupícola, TerrestreB
Ejemplar revisado
Chih (Knobloch 625, MEXU; Pringle 447, NY). Coah (Palmer 1422, NY). Dgo (Díaz Luna 7423, UC; Johnston 7793, UC). Gto (Carranza G. 3721, IEB). NL (Aguirre C. 857, ENCB). SLP (Orcutt 5392, DS). Tam (Johnston 4884, MEXU). Zac (Johnston et al. 11528B, LL, TEX).
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Elevación
100 – 1750 mA
Tipo de vegetación
Matorral espinoso, Selva bajaB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
The scabrous, pustulate hairs of Cheilanthes horridula make it one of the more distinctive species of Cheilanthes in Mexico. The species includes two sexually reproducing cytotypes in North America (Windham & Rabe in FNA Ed. Comm., 1993).A