Cheilanthes membranacea Maxon
Descripción
Rhizomes compact, horizontal to ascending, 5–8 mm diam.; rhizome scales linear-lanceolate, concolorous, castaneous, lustrous, 5–6 mm long, entire; fronds to 68 cm long, clumped; stipes ca. 2⁄3 the frond length, 1.5–3.5 mm diam., castaneous, grooved, lustrous, glabrous, tightly clustered; blades broadly deltate, quadripinnate-pinnatifid to quinquepinnate, the segments mostly elliptic, entire, discrete; adaxial and abaxial surfaces glabrous; laminar margins recurved, strongly modified into 0.8–1 mm wide false indusia, erose to short-fimbriate with hairs 0.1 mm long, very long-decurrent; spores tan.A
Ejemplar revisado
Jal (Boutin & Brandt 2306, NY). Oax (Hellwig 358, 359, NY; Mickel 1194, 7057, 4070, 7057, 7431, NY). Ver (Balls 4642, US).
Unverified, Doubtful, or Mistaken Reports. Chis (reported by Mickel & Beitel, 1988, but not verified). Mor (reported by Riba et al., 1996, but cited specimens are C. marginata and C. pyramidalis).
A
Unverified, Doubtful, or Mistaken Reports. Chis (reported by Mickel & Beitel, 1988, but not verified). Mor (reported by Riba et al., 1996, but cited specimens are C. marginata and C. pyramidalis).
A
Elevación
2750 – 3300 mA
Tipo de vegetación
Bosque de pino-encino, Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Cheilanthes membranacea is distinct in having wide, fimbriate, long-decurrent indusia and occurring at elevations over 2750 m. Cheilanthes selinoides is apparently a form of C. membranacea with entire, rather than erose to fimbriate, indusial margins. In all other characters, they seem to be identical to the former: the large ascending rhizomes, flexuous rachises, and very broad and long-decurrent indusia. Cheilanthes membranacea is distinct from C. marginata in the larger plant size, more massive rhizomes, and castaneous (vs. black) rhizome scales.A