Cheilanthes decomposita Willd.
Descripción
Rhizomes compact, horizontal, 2–3 mm diam.; rhizome scales linear-lanceolate, concolorous, dark reddish brown to black, lustrous, entire, 2.5–3 mm long; fronds 30–50 cm long, clumped; stipes 1⁄2–3⁄4 the frond length, castaneous, lustrous, grooved, glabrous; blades 12–20 X 12–20 cm (length:width ratio 0.8–1:1), tripinnate-pinnatifid to quadripinnate, strongly deltate, basal pinnae largest, glabrous on both sides; pinna pairs 14–20 (apical 2–5 pairs entire, upper median 4–8 pairs pinnate, lower median 4–7 pairs bipinnate, basal 1–2 pairs tripinnate), terminal segments conform, narrow, lanceolate, 0.7–1.5 cm X 1.5–2.5 mm (length:width ratio 4.5–6:1); basal pinnae pair exaggerated basiscopically, 15–20 X 8–10 cm (length:width ratio 1.6–2.2:1), with 14–18 pinnule pairs (distal 5–6 pairs entire, median 8–10 pairs pinnate, basal 2–3 pairs bipinnate); basal basiscopic pinnules 6–8 cm long, 11–13 lobes, terminal segments 1.5–2 mm wide, basal lobe with 2–3 lobules; laminar margins recurved, strongly modified into 0.3–0.5 mm wide false indusia, suberose to erose, surface whitened with papillae; spores black.A
Forma de vida
TerrestreB
Ejemplar revisado
DF (Sánchez 151, MEXU). Dgo (Sánchez 741, MEXU). Gro (Campos R. 1315, FCME). Jal (Pringle 2588, NY). Méx (Tejero-Díez 2578, IZTA). Mich (Arsène s.n., 9 Aug 1909, NY). Nay (McVaugh 16427, NY). Oax (Mickel 6064, NY). Sin (Bartholomew 2522, CAS; Gentry 6501, ARIZ). Ver (Müller 66, NY).A
Distribución
México (país) EndémicoA
Elevación
900 – 2300 mA
Ecología y Hábitat
Shaded banks, often near streams.A
Tipo de vegetación
Bosque de encino, Selva bajaB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Cheilanthes decomposita is part of the C. angustifolia complex (including also C. cuneata and C. chaerophylla). See discussion of the complex and intermediates under C. angustifolia.A