Polypodium fuscopetiolatum A.R.Sm.
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Authority
Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.
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Family
Polypodiaceae
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Scientific Name
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Description
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Species Description - Rhizome creeping, 4-6 mm diam.; rhizome scales appressed to slightly spreading, lanceolate, central portion reddish-brown, tip whitish, filiform, minutely denticulate; fronds (8-)25-70 cm long, 5-25 cm wide; stipe 1/5-2/5 the frond length, castaneous, at least on lower side, rarely stramineous, glabrous or with rare hairs; blade ovate-deltate to ovate-lanceolate, deeply pinnatisect to pinnate, apex pinnatifid or terminal pinna subconform; rachis pubescent with erect 0.1-0.3 mm hairs, castaneous; pinnae 8-18 pairs, lanceolate, 9-15 mm wide, apex acute to acuminate, slightly constricted near the base, the base dilated, excavate basiscopically, surcurrent; midvein abaxially sparsely to densely hairy (0.3 mm long), adaxially with dense 0.1 mm long hairs; laminar surfaces glabrous; margin serrulate; veins netted (goniophlebioid); sori round, medial or submedial; sporangia with inconspicuous single short (0.1 mm) seta.
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Discussion
Type. Mexico. Chiapas: 6-8 km WNW of Soyalo, Breedlove 37155 (DS). Polypodium fuscopetiolatum is distinguished from P. hispidulum by the narrower, somewhat bicolorous, denticulate rhizome scales and the lustrous, castaneous stipe and rachis.
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Distribution
Epiphytic and epipetric in oak and pine-oak woods; Juquila, Pochutla, Putla, Sola de Vega; 300-2150 m. Mexico (Jal, Mich, Gro, Mex, Oax, Chis); Guat, Salv.
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