Pogonatum procerum (Lindb.) Schimp.

  • Authority

    Sharp, Aaron J., et al. 1994. The Moss Flora of Mexico. Part Two: Orthotrichales to Polytrichales. Mem. New York Bot. Gard. 69 (2)

  • Family

    Polytrichaceae

  • Scientific Name

    Pogonatum procerum (Lindb.) Schimp.

  • Description

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    Species Description - Medium-sized to very tall plants, in loose tufts. Stems stout, simple or continuing by subfloral innovation, 6-10(-25) cm tall, densely leafy in the uppermost part, bracteate to leafless below. Leaves erect, involute-tubulose when dry, flat and erect-spreading when moist; sheath elliptic to scarcely differentiated, 2-3 mm long, 2.5 mm wide, entire or less commonly denticulate in the upper part; limb linear, acute, toothed at back near the tip, 7—12 mm long, 1.2-1.5 mm wide; marginal portion ofthe lamina narrow, 2^1 cells wide, serrate and toothed; lamellae crenulate in profile, 2-3 cells high, with marginal cells in pairs, rounded, smooth, 16 µm tall, the pairs 20 µm wide; sheath cells rectangular to prosenchymatous, 70-90(-120) µm long, 13-16 µm wide. Dioicous. Perichaetial leaves not strongly differentiated. Setae 3.5-4 cm long; capsules cylindric, with longitudinal ridges, 5-6 mm long, 1.5 mm in diameter; exothecial cells smooth to mammillose, 30-40 x 40-60 µm; operculum short-beaked; peristome teeth 32, double, deep red.

  • Discussion

    Fig. 806a-e

    P. procerum (Lindb.) Schimp. ex Jaeg., Ber. Thatigk. St. Gallischen. Naturwiss. Ges. 1873-74: 265. 1875.

    Polytrichum flexuosum C. Müll., Linnaea 19: 208. 1846.

    Polytrichum procerum Lindb., Not. Sallsk. Fauna Fl. Fenn. Forh. 9: 98. 1868.

    Pogonatum robustum Mitt., J. Linn. Soc, Bot. 12: 616. 1869.

    P. flexuosum (C. Müll.) Broth, in E. & P., Nat. Pfl. 1(3): 691. 1905, non. Mitt., 1860.

    Pogonatum procerum is a distinct species with consistently paired, rounded marginal cells of lamellae. Menzel (1985) incorrectly referred it, as P. robustum, to the synonymy of P. subflexuosum (Lor.) Broth. According to Hyvonen (1989a), P. procerum must replace the more familiar name, P. robustum Mitt.

  • Distribution

    Chiapas, Mexico, Oaxaca, Puebla, Veracruz.-Mexico; Central America; West Indies.

    Mexico North America| Central America| West Indies|