8. Physcomitrium sphaericum (Ludw.) Fürnr. in Hampe 立碗藓 li-wan xian
Flora 20: 285. 1837. Gymnostomum sphaericum Ludw. in Schkuhr, Deutschl. Krypt. Gew. 2(1): 26. f. 11b. 1810. Type. Germany.
Physcomitrium systylioides C. Müll., Nuovo Giorn. Bot. Ital., n. ser., 5: 160. 1898. Type. Japan: Yokohama.
Plants small, bright green, in loose tufts. Stems erect, unbranched, 3–8 mm high. Lower stem leaves smaller, ca. 1.0 mm × 0.6–0.8 mm, upper leaves larger, ca. 4.0 mm × 1.2 mm, obovate to oblong-obovate, acute to acuminate at apex; margins usually entire, sometimes bluntly serrulate above; costa percurrent or shortly excurrent as a short
apiculus; upper and median leaf cells small, short-rectangular to pentagonal or hexagonal, 50–75 µm × 30–40 µm; basal cells larger, irregularly rectangular, 150–180 µm × 30–50 µm; marginal cells slightly elongate and narrower, forming an indistinct border. Autoicous. Setae reddish brown, 2–3 mm long; capsules subspherical, reddish brown, mouth wide; apophyses short; opercula low-conic, with a short, obtuse-apiculus; annuli small; peristome absent. Calyptrae mitrate-rostrate, lobed at base. Spores spherical, blackish brown, 25–35 µm in diameter, densely and spinulosely papillose.