3. Neckeropsis exserta (Hook. ex Schwägr.) Broth.   长柄拟平藓   chang bing ni ping xian

Nat. Pflanzenfam. (ed. 2), 11: 188. 1925. Himantocladium exsertum (Hook. ex Schwägr.) M. Fleisch., Musci Buitenzorg 3: 887. 1908. Distichia exserta (Hook. ex Schwägr.) Mitt., Hooker’s J. Bot. Kew Gard. Misc. 8: 354. 1856. Neckera exserta Hook. ex Schwägr., Sp. Musc. Frond., Suppl. 3(1): 244. 1828. Type: Nepal. Wallich s.n.

 

Plants varying in size, usually large, yellowish green, very glossy, in loose mats. Primary stems creeping, with scale-like leaves and sparse rhizoids; secondary stems up to 10 cm long or longer, complanately foliate, sparsely branched or pinnately branched, with branches ca. 1 cm long, obtuse or attenuate at the apex, flagelliform branches often present. Leaves pseudotetrastichous, in 8 rows, widely spreading at ca. 90° from the stems, oblong-lingulate or broadly ovate-lingulate, asymmetric, strongly undulate, truncate or rounded, sometimes apiculate at the apex, widened at the base, somewhat sheathing or auriculate at the base; margins irregularly serrulate, sometimes entire at the apex, entire below; costae single, ending at ca. 3/4 the leaf length, rarely forked above; upper and apical cells irregularly quadrate or oval, 3–5 µm wide, thick-walled; median cells somewhat elongate; basal cells obliquely rhomboidal to ca. 20 µm long; marginal cells becoming slightly elongate and forming indistinct borders. Cladautoicous. Inner perichaetial leaves sheathing at the base, acuminate at the apex. Setae 0.7–2.5 mm long; capsules exserted, cylindrical, brown; opercula conic, with an oblique beak; peristome double; exostome teeth yellowish green, lanceolate, finely papillose, coarsely trabeculate, sometimes perforate at the apex; endostome segments yellowish green, linear, finely papillose. Calyptrae mitrate, rarely cucullate, yellow, hairy. Spores green, 15–20 µm in diameter, finely papillose.