Callicostella pallida (Hornsch.) Ångstr.
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Authority
Buck, William R. 2003. Guide to the plants of central french Guiana. Part 3. Mosses. Mem. New York Bot. Gard. 76: 1-167.
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Family
Pilotrichaceae
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Scientific Name
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Description
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Species Description - Plants medium-sized, in lustrous or dull, green, golden, or brownish, mostly dense mats; stems to ca. 4 cm long, usually 1.5-2 cm, subpinnately to irregularly branched, densely foliate. Leaves contorted when dry, the lateral ones erect-spreading, the dorsal and ventral ones erect, oblong to oblong-ovate, typically broadly rounded at the apex, often apiculate, sometimes acute, rarely short-acuminate, ± asymmetric, rounded to the insertion, (0.7)0.9-1.4(1.5) x 0.5-0.6 mm; margins typically closely and regularly serrulate to serrate above, with ± swollen and often bifid teeth, plane, not or obscurely bordered below; costa mostly subpercurrent, ending ca. 5 cells below margins, the upper ca. 1/4 typically converging, projecting at apex, sometimes with 2-4 teeth, often with scattered teeth in upper 1/4; cells rounded to angled, ± isodiametric, ca. 9 pm wide, usually with a single papilla over each lumen, rarely smooth, thin- to firm-walled, at midleaf sometimes becoming hexagonal, ca. 2-3:1, otherwise like upper ones, becoming short-rectangular, smooth, and often colored across the insertion. Asexual propagula not seen. Autoicous and/or synoicous. Setae smooth throughout or roughened above to throughout, reddish, 0.6-1.5 cm long, mostly 0.7-1 cm, flexuose, curved at extreme apex; capsules inclined to pendent, ovoid to cylindric, 0.7-1.3 mm long, often with a roughened neck. In non-flooded moist forests and montane forests, very common, 200-700 m (more common at lower elevations), on soil, humus, wood, and rock.
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Discussion
I have not seen the type of either this species or that of C. merke- lii (Hornschuch) A. Jaeger. However, based on the distinctions given by Florschiitz-de Waard (1986), the species are very close, with different leaves from a single shoot sometimes assignable to different species.