Grammitis pilosissima (M.Martens & Galeotti) C.V.Morton

  • 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

    Grammitis pilosissima (M.Martens & Galeotti) C.V.Morton

  • Description

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    Species Description - Rhizome short-creeping or ascending; rhizome scales black, clathrate, linear-deltate, long-acuminate, 5-7 mm long, entire; fronds clumped; stipe 1/8-1/4 the frond length, gray-brown to black, reddish hairs dense, 2-2.5 mm long, with short pale multibranched hairs intermixed and inconspicuous, 0.3 mm long; blade pinnate to pin-natisect, linear-elliptic, tapering at both ends; rachis black with abundant long reddish hairs (1.5-2 mm long) on lower and upper surfaces, short pale hairs few and very inconspicuous; pinnae linear-oblong, 7-14 mm long, 3-5 mm wide at base, 2-3 mm wide at midpinna, opposite to alternate, obtuse, costae not evident, only slightly ascending, about equally slightly surcurrent and decurrent; costa, lower lamina and margin with abundant, long, reddish hairs (1-2 mm), the short pale ones very sparse and inconspicuous; veins pinnate, obscure, hydathodes present; sori round, 4-7 pairs per pinna, hairs on lower lamina evenly scattered in sori; sporangia glabrous.

  • Discussion

    Polypodium pilosissimum Martens & Galeotti, Mém. foug. Mexique 39, t. 9, f. 2. 1842. Ctenopteris pilosissima (Martens & Galeotti) Copeland, Philipp. J. Sci. 84: 390. 1955 [1956]. Lectotype (chosen by A. R. Smith, 1981: 124). Mexico. Oaxaca, Galeotti 6379 (BR!; isolectotypes BR!, K!). See discussion under G. xiphopteroides.

  • Distribution

    Epiphytic in cloud forests; Ixtlán, Mixe, Tlacolula; 1850-2750 m. Mexico (Gro, Mex, Ver, Oax, Chis); Guat to CR.

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