1. Abietinella abietina (Hedw.) Fleisch. 山羽藓 shan-yu xian
Musci Buitenzorg 4: 1497. 1922. Thuidium abietinum (Hedw.) Schimp. in B.S.G., Bryol. Eur. 5: 165. 485 (fasc. 49–51 Mon. 9. 5). 1852. Hypnum abietinum Hedw., Sp. Musc. Frond. 353. 1801. Type. Europe.
Abietinella giraldii C. Müll., Nuovo Giorn. Bot. Ital. n. ser. 3: 115. 1896. Syntypes. China: Shaanxi (Schen-si), Huo-gia-zien, 20 Sept. 1890, Giraldi s.n.; Lun-san, Jun. 1891, Giraldi s.n.; Sche-liu-san, Aug. 1893, Giraldi s.n.; Si-ku-tziu-san, July 1894, Giraldi 919 (syntypes BM).
Plants robust, up to 10 cm long, rigid, yellowish or dark green above, brownish at base, in densely or laxly interwoven cushions. Stems regularly pinnately branched, ascending or erect; central strand present; paraphyllia numerous, foliose or filamentous, branched, apical cells multipapillose. Stem leaves broadly ovate at base, gradually narrowed to a lanceolate apex, deeply plicate, ca. 1–5 mm × 1 mm; leaf margins nearly plane or slightly revolute, serrate; costa stout, reaching 3/4 the leaf length, papillose at back; median leaf cells linear, mostly curved, 10–12 µm × 6–8 µm, thick-walled, unipapillose; apical leaf cells linear or oblong-oval, smooth; branch leaves concave, appressed when dry, erect-patent when moist, lanceolate to widely ovate, with a short acumen; margins entire or finely serrulate; costa reaching the upper portion of leaves; leaf cells oval to nearly quadrate, unipapillose. Dioicous. Perichaetial leaves ovate or widely ovate, gradually or suddenly narrowed to a lanceolate apex, costa absent. Capsules not seen.