Cheilanthes yavapensis Windham
Descripción
Rhizomes long-creeping, horizontal, 1–1.5 mm diam.; rhizome scales ovate-lanceolate, subconcolorous blackish, lustrous, 2–3 mm long, entire; fronds to 22 cm long, distant; stipes 1⁄3–1⁄2 the frond length, castaneous, terete, lustrous, with abundant linear whitish scales and hairs; blades narrowly lanceolate, 4-pinnate; pinnae 12–15 pairs, equilateral; segments bead-like, 0.5–1 mm long; adaxial surfaces glabrous; abaxial surfaces with ovatelanceolate, mostly castaneous scales, margins ciliate the entire length; laminar margins recurved, weakly differentiated; sporangia 32-spored; spores tan; n=2n=120, apogamous (USA).A
Ejemplar revisado
BCN (Chambers 645, DS). BCS (Moran 18738, 23871, SD).A
Distribución
México (país) Nativo y no endémicoA
Elevación
1520 – 1650 mA
Ecología y Hábitat
Rock crevices, north-facing slopes.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Cheilanthes yavapensis is thought to be the hybrid between C. covillei and C. lindheimeri (Gastony &Windham, 1989), but has most often been treated as part of C. wootonii. It is distinct from the latter species in having: rhizome scales dark brown to bicolorous, tightly appressed, and persistent (vs. brown, loosely appressed, and somewhat deciduous); adaxial blade surfaces sparsely pubescent (vs. glabrous); abaxial blade scales ciliate most of their length (vs. ciliate only in the basal half); n=2n=120, apogamous tetraploid (vs. n=2n=90, apogamous triploid).
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