Thelypteris cinerea (Sodiro) 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
Thelypteridaceae
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Scientific Name
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Description
Species Description - Rhizome erect; fronds narrowly lanceolate, deeply pinnate-pinnatifid to 25 cm long, 3-7 (-10) cm wide, lowermost 1-3 pairs reduced and auriculiform; stipes fasciculate, 6-12 cm long, ca. 1-2 mm diam., brownish, shining, glabrous; rachis minutely puberulous with hairs less than 0.1 mm long; pinnae ca. 15(-30) pairs, inequilateral with basiscopic side narrower, 2-4(-6) cm long, to 1.3(-2.0) cm wide, falcate; segments oblique, 2-3 mm wide, apex obtuse to acute; veins 3-5(-8) pairs per segment; costae setose above; glabrous or minutely puberulous below; leaf tissue on both sides glabrous or with sessile yellowish to reddish glands below; sori medial to supramedial; indusia large, persistent, to 1 mm diam., glossy, reddish-brown, often sessile-glandular; n = 29.
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Discussion
Nephrodium cinereum Sodiro, Anales Univ. Centr. Ecuador 22: 103. 1908. Type. Ecuador. Corazón, Aug 1903, Sodiro s.n. (not found at K or P, but authentic and topotypic specimen at P!-collected Dec 1907). Dryopteris sanctiformis Christensen, Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Afd. VII, 10: 130, f. 12d. 1913. Thelypteris sanctiformis (Christensen) Reed, Phytologia 17: 312. 1968. Type. Panama. Volcán Chiriquí, Maxon 5294 (US!; isotype P!). Complete synonymy cited in A. R. Smith (1983). Thelypteris cinerea is easily distinguished by the combination of short, uniform pubescence less than 0.1 mm long on the rachis and costae below, the relatively few pairs of reduced basal pinnae, inequilateral pinnae, and indusiate sori.
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Distribution
Along wet roadbanks; Ixtlán; 1900 m. Mexico (Oax, Chis); Guat to Pan; Ven, Col, Ec.
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