22. Grimmia tergestina Tomm. ex Bruch & Schimp. 南欧紫萼藓 nan-ou zi-e xian
Bryol. Eur. 3: 126. tab. 258 (fasc. 25–28). 1845. Type. Italy: In rupibus calareis umbrosis loco. “Bosco di Melara” prope Tergestum, sociis Grimmia pulvinata et Barbula rurali. Clar. Tommasisi detexit atque benevole communicavit. (lectotype BM, designated by T. Cao & Vitt 1986).
Grimmia kansuana C. Müll., Nuovo Giorn. Bot. Ital., n. ser. 3: 109. 1896. Type. China: Gansu (Kansu), Regio Tangut, Tatung, 8–9000 ft., 1/13 VIII, 1880, Przewalski s.n. (lectotype PC, designated by Muñoz 2000b). Synonymized by Muñoz 2000b.
Grimmia subtergestina C. Müll., Nuovo Giorn. Bot. Ital., n. ser., 3: 109. 1896. Type. China: “Prov. Kansu, ad flumen Bardun prope ostium fluntinis Solomo, Majo 1886, G.N. Potanin legit. Sterilem.” (isotype BM? H?).
Plants rather stiff, up to 2.5 cm high, yellowish green above, dark brown below, in dense, rigid tufts. Stems sparsely branched, with well developed central strand in cross section. Leaves erect, imbricate when dry, spreading when moist, 2.4–2.8 mm long, oblong-ovate, obviously concave, ending in a more or less long (0.6–0.9 mm), nearly smooth, hyaline hair-point, upper leaves enlarged, with pale hyaline margins along leaf bases; margins plane or somewhat incurved, entire; costa slender, percurrent, in cross section flattened, with small median cells and abaxial small cells; upper cells bistratose, obscure, small, 5–7 µm wide, rounded-quadrate, with thick walls; basal cells elongate-rectangular, 23–40 µm × 7–9 µm, with straight, thin walls, 3–5 rows of cells near margins colorless, hyaline with rather thin walls. Dioicous. Perichaetial leaves much larger and differentiated from vegetative leaves, oblong to oblong-ovate, ending in long awns, strongly concave, margins membranous and pallid, cells rectangular to elongate-rhomboidal, thin-walled. Setae yellowish, straight, shorter than capsules, ca. 0.3–0.4 mm long; capsules immersed, reddish brown, ca. 1.6 mm long, ovoid, smooth or nearly so; exothecial cells rectangular to quadrate, thin-walled; stomata present near base of urns; annuli consisting of 2–3 rows of thick-walled cells; opercula with straight beaks; peristome teeth erect, lanceolate, ca. 0.25 mm long, yellowish brown, split above, strongly perforate to the middle part; outer surface densely papillose in upper 2/3, papillose, with slight vertical strips below; inner surface papillose throughout. Calyptrae mitrate, lobed at base. Spores 9–11 µm in diameter, yellowish, granulose in regular rows.