1. Mesonodon flavescens (Hook.) W. R. Buck 黄色斜齿藓 huang se xie chi xian
J. Hattori Bot. Lab. 48: 117. 1980. Campylodontium flavescens (Hook.) Bosch & Sande Lac., Bryol. Jav. 2: 128. 1865. Pterogonium flavescens Hook., Musci Exot. 2: 155. 1819. Type: Nepal.
Plants medium-sized to rather large, yellowish green to brownish, glossy, in dense mats. Stems prostrate, irregularly branched; branches short, erect or ascending, often julaceous, densely foliate. Leaves imbricate when dry, erect-spreading when moist, ovate-lanceolate, 2.0–2.3 mm × 0.8–0.9 mm, plicate, concave, gradually acute at apex; margins plane, entire below, serrulate near apex; costae absent; median leaf cells linear-rhomboidal, 70–80 µm × 8–9 µm, smooth; alar cells differentiated into a triangular group, quadrate to shortly rectangular. Setae straight, to ca. 15 mm long, smooth; capsules erect, shortly cylindrical; opercula long conic-rostrate; peristome double, inserted well below the mouth; exostome teeth cross-striolate below, papillose above; endostome linear, often recurved. Calyptrae cucullate, smooth. Spores 18–28 µm in diameter, papillose.