Pleopeltis alansmithii (R.C.Moran) A.R.Sm. & Tejero
Descripción
Rhizomes creeping, 2–4 mm diam.; rhizome scales appressed, 2–2.5 X 0.5–0.8 mm, bicolorous with black-sclerotic central stripe (0.3 mm wide at base), and margins brown, thin, denticulate, plane to slightly crisped; fronds (10–)16–30 cm long, distant; stipes nearly 1⁄2 the frond length, non-alate, castaneous, grooved, glabrescent to very sparsely scaly; costae pale, nearly flush with the laminar surface; blades broadly ovate, pinnatisect, 5–12 cm wide, proximal pinnae not reduced, somewhat descending, distal pinnae ascending; pinnae 10–16 pairs, linearlanceolate, acuminate or occasionally obtuse, 2.5–6 cm X 4–8 mm, broadest in middle, bases largely decurrent, acroscopically subauriculate; adaxial surfaces glabrescent, with lime-dots often in two rows on each side of costa, costae and rachises pale, stramineous, prominent; abaxial surfaces with scattered, brown, lanceolate, round (0.5 mm diam.) to linear-lanceolate (1 mm long), clathrate scales; pinna margins serrate to crenulate; sori round, supramedial; sporangia glabrous.A
Forma de vida
EpífitaA
Ejemplar revisado
(Related to the synonym Polypodium alansmithii) Chis (Mickel 1242, NY). Gro (Rzedowski 18533, ENCB, 18577, NY). Oax (Ishiki 1290, IEB; Mickel 4342, 4573, 4612, 4928, 5520, 5257, NY).A
Elevación
1500 – 3000 mA
Tipo de vegetación
Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
(In relation to the synonym) Polypodium alansmithii is closely allied to P. plebeium but generally occurs at higher elevations and has appressed rather than patent rhizome scales with plane rather than ruffled margins. These characters do not hold strictly, and further work is needed. This species has been called P. montigenum Maxon (type from Costa Rica) (Field Mus. Nat. Hist., Bot. Ser. 17: 306. 1938) in Smith (1981) and Mickel & Beitel (1988), but Moran (in Davidse et al., 1995) pointed out that P. montigenum differs in having pinnae that are obtuse at apices, widest at middle, and somewhat constricted near bases. Polypodium montigenum is confined to Costa Rica and Panama.A