1. Macrothamnium javense Fleisch. 爪哇南木藓
Hedwigia 44: 311. 1905. Type: Indonesia. Java.
Chaetomitriopsis diversifolia Zant., Nova Guinea, Bot. 10: 316. 1964.
Macrothamnium hylocomioides Fleisch., Nova Guinea 12(2): 125. 1914.
Plants rather robust, up to 10 cm long. Main stems mostly dendroid; new branches arcuate, creeping, with several, small, cuspidate branchlets. Stem leaves spreading when dry, cordate at base, semi-orbicular, concave, ca. 1.5 mm × 1.5 mm, broadly acute or obtuse, apex somewhat reflexed, long and broadly decurrent at base, clasping; margins sharply toothed above; costae double; median leaf cells linear, 30–40 µm × 4–5 mm, thin-walled; basal cells loose; alar cells enlarged, numerous, rectangular or irregular, thin-walled; branch leaves imbricate when dry, ovate or oblong-ovate, broadly acute, ca. 0.65 mm × 0.4 mm; costae indistinct. Inner perichaetial leaves oblong-lanceolate, with a long subulate, reflexed apex, ca. 4 mm long, toothed above, ecostate. Setae ca. 4.5 mm long, twisted; capsules horizontal, oblong-ovoid, ca. 2.7 mm × 1.3 mm; exothecial cells ca. 0.6 mm long; endostome segments as high as the teeth, keeled, perforated; cilia long. Spores 15–20 µm in diameter.