Thelypteris cinerea (Sodiro) A.R.Sm.

  • Authority

    Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.

  • Family

    Thelypteridaceae

  • Scientific Name

    Thelypteris cinerea (Sodiro) A.R.Sm.

  • Description

    Species Description - Rhizomes erect; fronds fasciculate to 45 cm long; stipes brownish, lustrous, 6–12 cm x ca. 1–2 mm, glabrous; blades 12–35 x2.5–10 cm, 1–3 pairs of proximal pinnae reduced and auriculiform; pinnae ca. 15(–30) pairs, 2–4(–6) x 1.3(–2) cm, inequilateral with basiscopic segments shorter and more oblique, falcate; aerophores absent; segments oblique, 2–3 mm wide, apices obtuse to acute; veins 3–5(–8) pairs per segment; indument abaxially absent or of minute hairs 0.1 mm long along rachises, costae, adaxially the costae setose, tissue between veins on both sides glabrous or with sessile yellowish to reddish glands abaxially; sori medial to supramedial, with indusia persistent, reddish brown, glossy, to 1 mm diam., often sessile-glandular; sporangia glabrous; 2n = 58 (Oax, Chis).

  • Discussion

    Nephrodium cinereum Sodiro, Anales Univ. Centr. Ecuador 22: 103. 1908. Type. Ecuador. Corazo´n, Aug 1903, Sodiro s.n. (not found at K or P, but authentic and topotypic specimen at P!-collected Dec 1907). Dryopteris sanctiformis C. Chr., Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Math. Afd., ser. 7, 10: 130, f. 12d. 1913. Thelypteris sanctiformis (C. Chr.) C. F. Reed, Phytologia 17: 312. 1968. Amauropelta sanctiformis (C. Chr.) A° . Lo¨ve & D. Lo¨ve, Taxon 26: 325. 1977. Type. Panama. [Chiriqui´:] Volca´n Chiriqui´, Maxon 5294 (US!; isotypes NY!, P!). Complete synonymy given in Smith (1983).

    Thelypteris cinerea is easily distinguished by the combination of short, uniform pubescence less than 0.1 mm long on the rachises and costae abaxially, the relatively few pairs of reduced proximal pinnae, inequilateral pinnae, and indusiate sori.

  • Distribution

    Along wet roadbanks, montane rain forests; 1600–2200 m. Mexico; Guat, CR, Pan; Col, Ven, Ec, Bol.

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