Pecluma divaricata (E.Fourn.) Mickel & Beitel
Descripción
Rhizomes short-creeping, 6–10 mm diam.; rhizome scales dark reddish brown with blackish tips, 1.5–2 X 0.5 mm wide, narrowly deltate, comose, entire; fronds 35–135 cm long, distant to clumped; stipes reddish brown, 1⁄5–1⁄2 the frond length, with scattered to dense acicular hairs 0.1–0.3 mm, ctenoid hairs conspicuous; blades (10–)15–27 cm wide, narrowly deltate, proximal pinnae not or only slightly reduced; rachises abaxially with numerous ctenoid hairs ca. 0.1 mm long, sometimes also with scattered septate hairs to 0.5 mm; pinnae 4–15 cm X 4–9 mm, obtuse to acute, straight to occasionally slightly deflexed, equilateral at bases, costae of proximal pinnae at right angles to the rachises; veins free, 2–3 forked; indument adaxially of sparse to moderately dense hairs 0.1–0.3 mm on costae, laminar surfaces glabrous or nearly so, abaxially the costae bearing ctenoid hairs like those of rachises, sometimes also with sparse septate hairs to 0.5 mm, laminar surfaces between veins with appressed hairs 0.1–0.2 mm, margins with occasional scattered hairs 0.3–0.5 mm; sori round, supramedial with few, clavate paraphyses 0.1–0.3 mm; sporangia glabrous; spores reniform, 64 per sporangium; 2n=74 (CR).A
Forma de vida
o en ocasiones rupícola o terrestre. EpífitaA
Ejemplar revisado
Chis (Breedlove 32899, ENCB, 56483, 56519, 56567, ENCB, CAS; Palacios-Rios 2783, UC). Ver (Purpus s.n., DS, UC; Ventura A. 4952, ENCB, MICH, 11619, CHAPA, ENCB, XAL).
A
A
Elevación
600 – 1600 mA
Ecología y Hábitat
At bases of trees.A
Tipo de vegetación
(Ventura A. 11619) Bosque de neblina/mesófiloB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Pecluma divaricata is distinct in its brown stipes and the proximally truncate blades lacking greatly reduced pinnae. The pubescence along the rachises abaxially is peculiar, consisting of ctenoid hairs with tiny “teeth” less than 0.1 mm. Evans (1968) did not mention Polypodium divaricatum in his monograph of this group, although he annotated an isotype at BR as “Polypodium bolivianum?” in 1965.
This is the largest species in the genus in Mexico, and differs from P. ptilodon by the blades being truncate proximally and the absence of a patch of erect hairs around the sori. Pecluma divaricata is probably most closely related to the widespread P. eurybasis (C. Chr.) M. G. Price, from Costa Rica to Bolivia and the Greater Antilles, and these two seemingly intergrade in portions of their common range in South America.
A
This is the largest species in the genus in Mexico, and differs from P. ptilodon by the blades being truncate proximally and the absence of a patch of erect hairs around the sori. Pecluma divaricata is probably most closely related to the widespread P. eurybasis (C. Chr.) M. G. Price, from Costa Rica to Bolivia and the Greater Antilles, and these two seemingly intergrade in portions of their common range in South America.
A