2. Entodon aeruginosus Müll. Hal. 亮叶绢藓 liang ye juan xian
Nuovo Giorn. Bot. Ital., n.s., 5: 192. 1898. Cylindrothecium aeruginosum (Müll. Hal.) Paris, Index Bryol. Suppl. 107. 1900. Type: China. Shaanxi, Giraldi 1991b (lectotype FI).
Cylindrothecium purum (Müll. Hal.) Paris,Index Bryol. Suppl. 107. 1900. Entodon purus Müll. Hal., Nuovo Giorn. Bot. Ital., n.s., 5: 193. 1898. Type: China. Shaanxi, Sept. 1896, Giraldi s.n.
Plants medium-sized to rather large, yellowish green, glossy, in dense mats. Stems prostrate, irregularly pinnately branched, branches short, somewhat flat, or more or less julaceous. Stem leaves oblong-elliptical or broadly ovate, 2.0–2.5 mm × 0.5–1.2 mm, deeply concave, acute or apiculate at apex; margins entire, constricted at leaf base; costae double, very short or absent; median leaf cells linear; alar cells quadrate, shortly rectangular or oblate, thin-walled. Autoicous. Setae straight, 15–20 mm long, reddish; capsules cylindrical, brownish, 2.0–2.5 mm long; opercula bluntly conic-rostrate; annuli unknown; exostome teeth lanceolate, cross-striolate in basal 3–4 plates, vertically striolate or papillosely striolate above, smooth at tips; endostome reduced. Spores not seen.