Porotrichum substriatum (Hampe) Mitt.

  • Authority

    Buck, William R. 2003. Guide to the plants of central french Guiana. Part 3. Mosses. Mem. New York Bot. Gard. 76: 1-167.

  • Family

    Neckeraceae

  • Scientific Name

    Porotrichum substriatum (Hampe) Mitt.

  • Description

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    Species Description - Plants relatively small, to ca. 5 cm tall, stipitate-frondose with a relatively short stipe and a ± triangular frond, in mostly pale green, sparse colonies; secondary stems distinctly stipitate, to 1 cm tall, almost nonexistent in juvenile plants, mostly erect, frondose, mostly regularly 1-pinnate, sometimes irregularly so, rarely weakly 2- pinnate, usually complanate-foliate. Stipe leaves widely spaced, typically squarrose-recurved from a ± appressed base, not complanate, broadly triangular, 0.6-1 mm long, broadly acuminate. Secondary stem leaves complanate, erect- to wide-spreading, broadly ovate to oblong-ovate, abruptly short-acuminate to cuspidate, 1.1-1.4(2.5) x 0.4-0.6 mm; margins serrulate above, subentire below, plane to narrowly recurved below; costa ending ca. 3/4 the leaf length, smooth; cells fusiform, mostly ca. 4-5:1, 20-35 x 6-8 µm, smooth, firm-walled, ± porose, becoming thicker-walled at apex and toward the insertion; alar cells short-rectangular, thick-walled, few in extreme basal angles. Branch leaves wide-spreading dry or moist, complanate, ovate, ± gradually short-acuminate but sometimes appearing abruptly acuminate because of incurved subapical margins, ± concave, ± plicate when dry, 0.5-1 x 0.2-0.3 mm; margins serrate to serrulate almost throughout, usually with a few larger, more prominent teeth toward apex, plane or incurved subapically, sometimes strongly so and overlapping, plane or narrowly recurved below; costa ending 1/2-3/4 the leaf length, usually projecting as a small spine at apex; cells long-hexagonal to fusiform, 20-35 x 6-8 µm, typically conspicuously prorulose at upper ends at back, especially above, firm-walled, not porose; alar cells subquadrate, mostly few but distinct in basal angles. Asexual propagula common, of flagellate branches arising from branch apices or axils of branch leaves, simple or branched, few to numerous. Dioicous. Sporophytes not seen.

  • Distribution

    In non-flooded moist forests and montane forests, common, 200-700 m, on tree trunks and branches, rarely on rocks.

    French Guiana South America|