Cheilanthes leucopoda Link

Contenido

Descripción

Rhizomes compact, horizontal, 4–10 mm diam.; rhizome scales linear, concolorous, dull orange-tan, entire; fronds to 35 cm long, clumped; stipes ca. 2⁄3 the frond length, stramineous, grooved distally, with a few scales at base, also with abundant patent hairs 0.5–1 mm long; blades broadly pentagonal, 4-pinnate, 5–15 cm wide; rachises grooved adaxially; basal pinnae strongly inequilateral, the basal basiscopic pinnules greatly exaggerated, costae green to stramineous; ultimate segments oblong to lanceolate, not bead-like, the largest 3–5 mm; adaxial and abaxial surfaces with scattered stiff hairs similar to those on the axes; segment tips curved and weakly differentiated as false indusia, sori discontinuous, concentrated on apical and lateral lobes; sporangia 32-spored; spores dark brown; 2n=60 (NL, USA).A

Forma de crecimiento

Hierba

Forma de vida

TerrestreB

Nutrición

Autotrófica

Ejemplar revisado

Chih (Pringle 442, NY). Coah (Stanford et al. 82, NY). Dgo (Iltis & Lasseigne 135, NY). Gto (Ventura & López 8998, MEXU). Hgo (Chase 7234, NY). NL (Hinton et al. 21182, ARIZ; Pringle s.n., 20 Jun 1888, NY). Qro (Rzedowski 46443, MEXU). SLP (Purpus 4879, NY). Tam (Stanford et al. 2123, NY).
A

Distribución

México (país) Nativo y no endémicoA, Norteamérica al N de México PresenteA

Elevación

(150 –)1000 – 2250 mA

Ecología y Hábitat

Rocky slopes and ledges, apparently confined to limestone.A

Tipo de vegetación

Selva baja, Bosque de pino, Bosque de pino-encino, Matorral espinoso, Matorral micrófiloB

Categoría IUCN

No incluidaC

Categoría NOM-059-SEMARNAT-2010

No incluidaD

Estatus del taxón

(A) Como definida actualmente, probablemente una entidad natural (monofilética)

Discusión taxonómica

Cheilanthes leucopoda has 32 spores per sporangium but is a sexual diploid (Windham & Rabe in FNA Ed. Comm., 1993). This species is distinct in its broadly deltate hairy blades with stramineous axes. Molecular evidence (Cranfill, unpubl.) suggests a relationship with C. aurea in Notholaena, though it lacks the farina of that species. A

Bibliografía

A. Mickel, J. T. & Smith, A. R. 2004: The Pteridophytes of Mexico Vol. 88

B. Velázquez Montes, E. 2019: Familia Pteridaceae. En: Rzedowski, J. & Hernández Ledesma, P. (Eds.). Fl. Bajío Regiones Adyacentes Fasc. 210: 1-249

C. IUCN 2022: The IUCN Red List of Threatened Species. Versión 2022-2

D. SEMARNAT 2019: MODIFICACIÓN del Anexo Normativo III, Lista de especies en riesgo de la Norma Oficial Mexicana NOM-059-SEMARNAT-2010: 101 pp. – https://www.dof.gob.mx/nota_detalle.php?codigo=5578808&fecha=14/11/2019#gsc.tab=0 [accessed 2023-05-04 06:16]