41. Brachythecium viridefactum Müll. Hal. 绿枝青藓 lu zhi qing xian
Nuovo Giorn. Bot. Ital., n.s., 4: 270. 1897. Type: China. Shaanxi, Giraldi s.n.
Plants rather large, bright green or pale yellowish green, in dense mats. Stems prostrate, ca. 4–8 cm long, branches short, curved, slender, often julaceous, with branchlets. Stem leaves triangular-lanceolate, 1.17–1.89 mm × 0.52–0.81 mm, nearly truncate at insertion, gradually acuminate toward apex; margins minutely serrulate nearly throughout; costae ending in leaf acumen to nearly percurrent; median leaf cells linear, 80–102 µm × 5–8 µm, with angled ends; alar cells differentiated, inflated, in a small group, rounded-quadrate or shortly rectangular to elliptical, extending close to costa at leaf base; branch leaves narrowly ovate-lanceolate, 1.35–1.58 mm × 0.41–0.45 mm, slenderly acuminate toward apex; margins serrulate; costae ca. 4/5 the leaf length. Sporophytes not seen.