8. Brachythecium erythrorrhizon Schimp. in B.S.G. 赤根青藓 chi gen qing xian
Bryol. Eur. 6: 18. pl. 547. 1853. Chamberlainia erythrorrhiza (Schimp.) H. Rob., Bryologist 65: 106. 1962. Type: Norway.
Plants medium-sized, pale green or yellowish green, glossy, in loose mats. Stems often ascending, with clustered rhizoids, irregularly or subpinnately branched, branches short, curved. Stem leaves erect-spreading, ovate-lanceolate, 1.5–2.0 mm × 0.4–0.5 mm, gradually acuminate, slightly secund, distinctly plicate; margins somewhat reflexed, entire below, serrulate above; costae extending to 1/2 to 3/4 the leaf length; median leaf cells linear, 60–90 µm × 6–7 µm; basal cells shorter, more or less porose; alar cells shortly rectangular, not extending close to costa at leaf base; branch leaves smaller, 1.23–1.50 mm × 0.36–0.41 mm, ovate-lanceolate, often secund; margins serrulate above; costae ca. 3/4 the leaf length. Dioicous. Setae 8–15 mm long, reddish brown; capsules elongate-ovoid, ca. 2.0 mm long; opercula shortly conic-rostrate; cilia present, nodulose. Spores finely papillose.