Cheilanthes hintoniorum Mendenh. & G.L.Nesom
Descripción
Rhizomes compact, horizontal, 2–3 mm diam.; rhizome scales bristle-like, 5–7 mm long, mostly only 1–2 cells wide, 3–4 cells wide at base, black, heavily indurate, entire; fronds to 17 cm long, clumped; stipes 1⁄3–2⁄5 the frond length, atropurpureous, terete, glabrous; blades pentagonal, 2–3-pinnate; pinnae 4–6 pairs, basiscopic pinnules of basal pinnae exaggerated; segments linear, mostly 10–15 X 1–1.5 mm, obtuse, apical ones mostly 12–20(–30) mm; adaxial and abaxial surfaces glabrous, but with pebbly surface; laminar margins recurved, but not strongly modified, into 0.5–0.7 mm wide false indusia, margins minutely shortpapillate, false indusia not decurrent, vein endings swollen and usually evident; spores brown.A
Ejemplar revisado
NL (Cowan 3753, UC; Nesom 4308, TEX; Hinton et al. 18639, 18765, 19315, TEX; 20157, IEB, TEX, 22695, ANSM, NY, TEX; Zamudio et al. 6215, IEB, NY; Zamudio & Lux 6162, IEB, NY).
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Distribución
México (país) EndémicoA
Elevación
965 – 2000 mA
Ecología y Hábitat
Gypsum cliffs and hillsides.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Cheilanthes hintoniorum is related to C. angustifolia and C. complanata, but has smaller plant size, hair-like rhizome scales, and occurs on gypsum (vs. neutral substrates). It is close to C. purpusii and C. pellaeopsis, but is less dissected, mostly bipinnate with linear segments, and its indusia are not decurrent. Cheilanthes apiacea is also close but has longer segments (mostly 10–15 mm long, terminal ones 20–25 mm).A