Megalastrum atrogriseum (C.Chr.) A.R.Sm. & R.C.Moran

  • Authority

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

  • Family

    Dryopteridaceae

  • Scientific Name

    Megalastrum atrogriseum (C.Chr.) A.R.Sm. & R.C.Moran

  • Description

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    Species Description - Differs from M. subincisum by the much longer hairs on the midribs and veins abaxially, the presence of long hairs on the veins adaxially, and the more weakly denticulate scales; from M. pulverulentum differing by the smaller fronds, and less decidedly toothed scales.

  • Discussion

    Dryopteris atrogrisea C. Chr., Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Math. Afd., ser. 8, 6: 70, f. 15. 1920. Ctenitis atrogrisea (C. Chr.) Ching, Sunyatsenia 5: 250. 1940. Type. Costa Rica. Tablazo, Biolley 70 (BM; isotype US!).

    This species differs from M. subincisum primarily in the much longer hairs on the costae, costules, and veins abaxially, and by having similar hairs on the veins adaxially; it also differs by the scales being less strongly denticulate along the midribs abaxially. From M. pulverulentum, with which it is also often confused, it differs in the much smaller fronds, less strongly denticulate scales, and more abundant hairs.

  • Distribution

    Terrestrial in wet lowland forests, 250–400 m. Mexico; CR, Pan.

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