小石藓属

Plants usually small, not more than 12 mm high, bright green or yellowish green, in dense tufts. Stems erect, short, simple or irregularly branched; central strand present. Leaves often crowded at stem tips, contorted-curved or crisped when dry, spreading or occasionally reflexed when moist, long-ligulate, oblong- or triangular-lanceolate to narrowly lanceolate, sheathing at base, upper lamina often channeled, sharply acute or acuminate at apex; margins strongly incurved or involute above the leaf base, entire or crenulate by projecting papillae; costa rather stout, usually shortly excurrent, ending in sharply mucronate tips, in cross section 2 stereid bands present; upper leaf cells subquadrate to hexagonal, thin- to evenly thick-walled, papillose, with bifid or branched papillae; basal cells sharply differentiated, rectangular, sometimes forming a V-shaped leaf base, mostly thin-walled, smooth, hyaline. Autoicous or dioicous. Perichaetial leaves not much differentiated from stem leaves. Setae short or elongate, straight, yellowish brown; capsules erect or slightly inclined, oblong-ovoid to oblong-elliptic or cylindrical; annuli none or differentiated, of 2–5 rows of vesiculose cells, persistent; opercula conic-rostrate, with a rather long, straight or obliquely beak, or opercula not differentiated; peristome teeth 16, short or rudimentary, papillose. Calyptrae cucullate, smooth. Spores spherical, yellowish brown to brown, papillose.

Lower Taxa

• Weissia brachycarpa (Nees & Hornsch.) Jur.
• Weissia breviseta (Thér.) P.-C. Chen
• Weissia controversa Hedw.
• Weissia edentula Mitt.
• Weissia exserta (Broth.) P.-C. Chen
• Weissia longifolia Mitt.