4. Bryhnia serricuspis (Müll. Hal.) Y.-F. Wang & R.-L. Hu   密枝燕尾藓   mi zhi yan wei xian

Acta Phytotax. Sin. 41(3): 272. 2003. Eurhynchium serricuspis Müll. Hal., Nuovo Giorn. Bot. Ital., n.s., 5: 197. 1898. Type: China. Shaanxi, Sept. 1896, Giraldi s.n.

 

Plants large, soft, pale green, in loose mats. Stems prostrate, to 6–8 cm long, subpinnately or irregularly branched; branches slender, ca. 0.5–1.0 cm long, loosely foliate, sometimes with a few branchlets, attenuate at tips. Stem and branch leaves more or less similar, ovate-lanceolate to triangular-lanceolate, 1.29–1.54 mm × 0.58–0.76 mm, more or less plicate, slenderly acuminate toward apex, constricted, distinctly decurrent at base; margins serrate above, serrulate below; costae nearly percurrent; median leaf cells rhombic, 24–30 µm × 7–9 µm, prorate; alar cells distinctly differentiated, shortly rectangular, not extending close to costa at leaf base. Sporophytes not seen.