Pecluma dispersa (A.M.Evans) M.G.Price

  • Authority

    Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.

  • Family

    Polypodiaceae

  • Scientific Name

    Pecluma dispersa (A.M.Evans) M.G.Price

  • Description

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    Species Description - Rhizome short-creeping, 4-8 mm diam.; rhizome scales 2 mm long, 1-1.5 mm wide, reddish-brown, lustrous, linear-deltate, acuminate, entire; fronds 27-63 cm long, clumped; stipe 1/5-2/7 the frond length, black, upper surface densely pilose with acicular hairs (0.1 mm) and scattered, appressed ctenoid hairs; rachis scales linear-deltate, not bullate, dark reddish-brown, lustrous, acuminate; blade narrowly deltate, 5-10 cm wide, reduced to lobes, somewhat deflexed, 2.5-5 cm long, 2-4 mm wide, obtuse, equilateral at base, surcurrent and decurrent, upper and lower laminar surfaces with rare to scattered trichomidia (0.1 mm); costa decurrent, abaxial midrib lightly pilose with acicular hairs and with reduced scales, adaxial midrib densely pilose with 0.1 mm long hairs; veins free, twice-forked; sori round (to oblong), medial, with a few clavate paraphyses (0.5-0.8 mm); sporangia glabrous or inconspicuously setose.

  • Discussion

    Polypodium dispersum A. M. Evans, Amer. Fern J. 58: 173, t. 27. 1968 [ 1969]. Type. United States. Florida: Citrus Co., Pineola Grottoes, Evans 2008 (MICH!; isotypes NY!, TENN, US!). Among the black-stiped species of Pecluma, P. dispersa is distinct in its adaxially densely puberulent stipe and rachis and broad, entire rhizome scales.

  • Distribution

    Epipetric (or epiphytic or terrestrial); Mixe, Pochutla; 800-900 m. Mexico (Tam, SLP, Hgo, Ver, Oax, QR); US (Fla); Guat to Nic; Gr Antill; Ven & Col, s to Bol, Braz, Galapagos Isl.

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