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Moss China | Family List | Moss China V. 2 | Pottiaceae

33. Trichostomum Bruch., Flora. 12:396. 1829.


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.

1 Leaf margins narrowly incurved in upper 1/3 -1/2   (2)
+ Leaf margins usually plane throughout   (4)
2 (1) Leaves often cucullate or channeled, acute or acuminate at apex   2 Trichostomum crispulum
+ Leaves more or less flat, scarcely cucullate, apiculate or obtusely pointed at apex   (3)
3 (2) Leaves apiculate at apex; basal cells forming a clearly differentiated group   6 Trichostomum sinochenii
+ Leaves mostly obtusely pointed at apex; basal cells not clearly differentiated   8 Trichostomum zanderi
4 (1) Leaves linear-lanceolate, often circinate when dry   (5)
+ Leaves ovate-lanceolate, narrow-lingulate to spathulate, or oblong, erect-flexuose or contorted when dry   (6)
5 (4) Leaf margins more or less undulate when dry; costa ending just below leaf apex   7 Trichostomum tenuirostre
+ Leaf margins plane when dry; costa shortly excurrent   3 Trichostomum hattorianum
6 (4) Leaves narrowly ovate-lanceolate; peristome teeth usually irregularly 2-3-divided; setae 10-12 mm long; dioicous   1 Trichostomum brachydontium
+ Leaves narrowly lingulate to spathulate or oblong; peristome teeth not divided; setae 5-7 mm long; autoicous   (7)
7 (6) Leaves not clearly narrowed at base, upper lamina sometimes keeled, rounded-obtuse at apex; costa percurent or shortly excurrent   4 Trichostomum planifolium
+ Leaves distinctly narrowed at base, widest at middle, uppper lamina plane, acute at apex; costa ending below apex   5 Trichostomum platyphyllum

Lower Taxa


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