4. Macrothamnium submacrocarpum (Ren. & Card.) Fleisch. 亚南木藓 ya nan mu xian
Hedwigia 44: 310. 1905. Microthamnium submacrocarpon Jaeg. ex Ren. & Card., Bull. Soc. Roy. Bot. Belgique 41(1): 99. 1905. Type: Nepal.
Macrothamnium stigmatophyllum Fleisch., Hedwigia 44: 310. 1905.
Plants soft, delicate. Stems with few annual innovations; branches slender, with several branchlets, curved or twisted when dry. Stem leaves spreading, somewhat recurved when dry, nearly round-ovate, up to ca. 1.2 mm × 1.0 mm, plicate, acute at apex, slightly decurrent at base; margins clearly undulate and sharply toothed; costae double, long; laminal cells similar to those of M. macrocarpummm; basal cells ca. 57 µm × 7 mm; alar cells not differentiated. Setae thin, erect, 3–4 cm long, arcuate; capsules horizontal to slightly pendent, ovoid-cylindrical, ca. 2.5 mm × 1.1 mm; opercula and peristome similar to those of M. macrocarpum.; alar cells differentiated, few; branch leaves similar to stem leaves, but narrower, ca. 0.64 mm × 0.35 mm, erect-spreading or spreading, serrate above; costae double; laminal cells elongate-rhomboidal, prorate; upper cells ca. 38 µm × 6