Micropterygium parvistipulum Spruce

  • Authority

    Fulford, Margaret H. 1966. Manual of the leafy Hepaticae of Latin America--Part II. Mem. New York Bot. Gard. 11: 173-276.

  • Family

    Lepidoziaceae

  • Scientific Name

    Micropterygium parvistipulum Spruce

  • Description

    Species Description - Leafy stems of small to medium size, greeni.sh to yellow-brown, compact, flattened, ascending from a branched rhizome, in mats; stems 0.5-1 cm long, with leaves to 1 mm broad, occasionally irregularly pinnately branched, and with numerous ventral flagelliform branches. Rhizoids in tufts from the scaleleaves of the flagelliform branches. Leaves patent, closely imbricate, usually lanceolate in outline when folded, to 0.64 mm long, ridge-keeled for most of the length, the dorsal and ventral parts more or less equal, the wing conspicuous, of three to five rows of cells, extending down to below the middle, the apex acute or shortly bifid, the margins crenulate and serrate; cells of the apical portion 14-18 µ, the wall over each cell strongly convex to mamillose, the walls thickened, trigones distinct, the cuticle verruculose. Underleaves conspicuous at the base of the stem, decreasing in size and becoming obscure toward the apex, the margin irregularly toothed and lobed. Male and female inflorescences and sporophyte not seen. Pl. 62. Fig. 14, a-d.

  • Discussion

    Certain packets of this collection contain plants with leaves in which the cell walls are plane or only convex and not mamillose. These have been cited under M. pterygophyllum.

  • Distribution

    Habitat: On ledges, banks, and wet rocks in forests. COLOMBIA: Vaupes: Rio Vaupes, near Mitii, Raudal Cuacuraba, Schultes & Cabrera 19272 (FH); Rio Kananari, Cachivera Palito, 250 m, Schultes & Cabrera 13112 (FH). VENEZUELA: Estado Amazonas: Serrania Paru, Rio Ventuari, Cumbre, 2000 m, Cowan & ]rurdack 31327 (NY); Estado Bolivar: Chimanta Massif, Torono-tepuí, 2165 m, Steyermark & Wurdack 688 p.p. (NY). BRAZIL: Rio Içana, Tunui, Lutzelburg 22947 (Hb Herzog); Rio Negro, Spruce, Hep. Sprue. [fem

    Colombia South America| Venezuela South America| Brazil South America|