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33. Trichostomum Bruch., Flora. 12:396. 1829.
毛口藓属
Plants small to medium-sized, yellowish green to light brown, in loose or dense tufts. Stems erect, simple or usually irregularly branched; central strand present. Leaves contorted-curved or crisped when dry, erect-spreading or weakly reflexed when moist, narrowly lanceolate to linear-lanceolate, broadly acute, setaceous or obtusely pointed, upper lamina sometimes broadly channeled or cucullate, sometimes weakly sheathing at base; margins usually plane, sometimes incurved and wavy, entire or crenulate by projecting papillae; costa stout, often excurrent as a short awn or as an apiculus, or sometimes percurrent, in cross section with 2 stereid bands; upper leaf cells rounded-quadrate or rounded-hexagonal, rather thin-walled to moderately thick-walled, green and obscure, each cell with several large, circular papillae on both surfaces; basal cells slightly elongate, irregularly rectangular, smooth, yellowish or hyaline. Dioicous or sometimes autoicous. Perichaetial leaves similar to stem leaves. Setae elongate; capsules erect, oblong-ellipsoidal to short-cylindrical, with short necks, rarely curved; annuli none or differentiated into 3–5 rows of vesiculose cells, persistent; peristome teeth erect, linear or filiform, undivided or sometimes divided, smooth or papillose; opercula conic-rostrate, with a short or long beak. Calyptrae cucullate, smooth. Spores spherical, yellowish or reddish brown, coarsely papillose.
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| 1 |
Leaf margins narrowly incurved in upper 1/3 -1/2 |
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(2) |
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Leaf margins usually plane throughout |
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(4) |
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| 2 (1) |
Leaves often cucullate or channeled, acute or acuminate at apex |
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2 Trichostomum crispulum |
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Leaves more or less flat, scarcely cucullate, apiculate or obtusely pointed at apex |
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(3) |
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| 3 (2) |
Leaves apiculate at apex; basal cells forming a clearly differentiated group |
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6 Trichostomum sinochenii |
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Leaves mostly obtusely pointed at apex; basal cells not clearly differentiated |
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8 Trichostomum zanderi |
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| 4 (1) |
Leaves linear-lanceolate, often circinate when dry |
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(5) |
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Leaves ovate-lanceolate, narrow-lingulate to spathulate, or oblong, erect-flexuose or contorted when dry |
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(6) |
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| 5 (4) |
Leaf margins more or less undulate when dry; costa ending just below leaf apex |
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7 Trichostomum tenuirostre |
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Leaf margins plane when dry; costa shortly excurrent |
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3 Trichostomum hattorianum |
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| 6 (4) |
Leaves narrowly ovate-lanceolate; peristome teeth usually irregularly 2-3-divided; setae 10-12 mm long; dioicous |
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1 Trichostomum brachydontium |
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Leaves narrowly lingulate to spathulate or oblong; peristome teeth not divided; setae 5-7 mm long; autoicous |
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(7) |
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| 7 (6) |
Leaves not clearly narrowed at base, upper lamina sometimes keeled, rounded-obtuse at apex; costa percurent or shortly excurrent |
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4 Trichostomum planifolium |
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Leaves distinctly narrowed at base, widest at middle, uppper lamina plane, acute at apex; costa ending below apex |
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5 Trichostomum platyphyllum |
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Lower Taxa
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