Polypodium alavae A.R.Sm.
Descripción
Rhizomes creeping, 4–8 mm diam., whitish; rhizome scales tan, deltate-lanceolate, entire to minutely denticulate, 5–7 x 1.5–2 mm, comose, dark brown and lustrous at point of attachment; fronds 40–90 cm long, distant; stipes ca. 1⁄3 the frond length, stramineous to brown, with short, erect hairs 0.1mm long; blades pinnatisect, deltate-lanceolate, 14–30 cm wide, the proximal pinnae narrowly attached, distal 1⁄3–2⁄3 of blades with broadly adnate pinnae; pinnae 16–40 pairs, 6–16 cm long, linear, acuminate, 5–13 mm wide, entire or subentire to crenulate proximally; abaxial surfaces pilose on costae and laminar surfaces; adaxial surfaces with erect hairs on costae, sparse on veins and margins; venation free except for occasional anastomoses; sori round, medial, ca. 2 mm diam.; sporangia with 4–8 capsular hairs 0.2–0.3 mm, about as long as the capsules.A
Forma de vida
EpífitaA
Ejemplar revisado
Chis (Breedlove 27188, NY, 22337, 32126, 37005, DS; Méndez Ton 9284, TEX).A
Elevación
1300 – 2000 mA
Tipo de vegetación
Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This species is closely related to P. subpetiolatum, but differs in having narrower, more parallel-sided, subentire pinnae, longhaired sporangia, and more coriaceous laminar tissue. It may also be related to P. puberulum but lacks the dense hairs on both laminar surfaces and has proximal pinnae constricted at their bases.
Matuda 27227 (MEXU, Edo. México) resembles P. alavae in its narrow subentire pinnae but has thin blade texture and few short capsular hairs and is probably P. subpetiolatum.
A
Matuda 27227 (MEXU, Edo. México) resembles P. alavae in its narrow subentire pinnae but has thin blade texture and few short capsular hairs and is probably P. subpetiolatum.
A