Isopterygium tenerum (Sw.) Mitt.
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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
Hypnaceae
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Scientific Name
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Description
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Species Description - Plants small to medium-sized, in often lustrous, mostly soft, pale or whitish to yellowish green, thin to dense mats; stems to ca. 3 cm long, irregularly but freely branched, the branches often simple, ± complanate-foliate to ± turgid. Leaves crowded, sometimes com- planate, erect-spreading, usually symmetric but occasionally ± asymmetric, especially the stem leaves, lanceolate to ovate-lanceo¬late, gradually acuminate, often long-acuminate, the apex sometimes twisted, 0.55-1.1(1.4) x 0.2-0.5 mm; margins often entire, some¬times minutely serrulate, plane; costa short and double, often absent; cells linear, 50-130 x 4-8 µm, not shorter in the acumen, becoming shorter, broader and laxer in 1-3 rows across the insertion; alar cells few but often conspicuous, in basal angles, rarely reaching the costa, in 2-4(5) rows, extending up the margins by 2-5 cells, quadrate to subquadrate. Asexual propagula seldom seen, clustered on stems, fil-amentous, uniseriate, simple or branched, the cells roughened. Auto- icous. Setae 0.5-1.2(2.2) cm long, twisted, typically curved just below the urn; capsules inclined to pendent, rarely suberect, ± arcuate, asymmetric, short-cylindric, 0.6-1.3 mm long, constricted below the mouth when dry.
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Distribution
In non-flooded moist forests and montane forests, common, 200-700 m, mostly on old wood.
French Guiana South America|