Adiantum tricholepis Fée
Descripción
Rhizomes short-creeping to ascending or suberect, ca. 4–6 mm diam.; rhizome scales orange-brown, becoming brown, 5–6 X 0.8–1.5 mm, lanceolate, apices each with an ephemeral, twisted hair, margins ciliate-denticulate, especially in distal half; fronds clumped, mostly 25–70 cm long, laxly arching; stipes castaneous to atropurpureous, 10–42 cm X 1–3 mm, ca. 1⁄3–3⁄5 the frond length, glabrous except at bases; blades ovate, 3–4-times pinnate, 15–45 X 15–35 cm, gradually tapering distally; rachises atropurpureous, glabrous; pinnae (4–)6–12 pairs, to 7–20 X 4–9 cm, alternate; pinnulets 4–15 X 4–18 mm, flabellate to almost round, margins entire to denticulate, sometimes shallowly incised, stalked 2–6 mm, stalk color stopping ± abruptly at bases of pinnulets, ultimately articulate; veins free, forking, ending at the entire margins or sometimes in tiny teeth in sterile pinnulets; indument of numerous stiff or curved acicular hyaline hairs 0.3–0.5 mm long on both sides of pinnulets; idioblasts absent; sori 3–10 per pinnulet, without farina; indusia 1–7 mm long, oblong to slightly lunate, with hairs ca. 0.3 mm long.A
Forma de vida
TerrestreA
Ejemplar revisado
Camp (Sanders et al. 9819, UC, UCR). Chih (Pringle 962, NY, UC). Chis (Breedlove 29049, DS, NY). Coah (Wynd 691, MO, NY, US). Col (McVaugh & Koelz 1547, CAS, IEB, NY). Dgo (Gentry 5271, NY). Gro (Orcutt 2563, DS). Jal (Pringle 1843, NY, UC, US). Méx (Matuda 31674, UC, US). Mich (del Llano 34, IEB). Mor (Lyonnet 762, CAS, MEXU, MO, NY). Nay (Téllez 11631, ENCB). NL (Pringle 1981, B, BR, CAS, DS, MO, UC, US). Oax (Mickel 5192, NY, UC). Qro (Carranza 1218, ENCB, IEB). QR (Torres 10, MEXU, UAMIZ). SLP (González Quintero 120, ENCB). Sin (Mexia 308, CAS, MO). Son (Sanders et al. 9355, UC). Tam (Palmer 180, B, NY, UC). Ver (Purpus 6062, GH, MO, NY, UC). Yuc (Gaumer 386, B, BR, CAS, F, K, MEXU, MO, NY, UC, US).A
Elevación
50 – 1450 mA
Ecología y Hábitat
On dry cliffs near streams.A
Tipo de vegetación
Selva alta, Selva medianaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Adiantum tricholepis is widespread and common in much of eastern and western Mexico, but is uncommon in Oaxaca and Chiapas. It is easily recognized by the presence of stiff, whitish hairs on both blade surfaces.A