10. Didymodon japonicus (Broth.) Saito, J. Hattori Bot. Lab. 39:508. 1975; Molendoa japonica Broth., Öfvers. Forh. Finska Vetensk.-Soc. 62A (9): 6. 1921.
日本对齿藓
Hymenostyliella japonica (Broth.) Saito, J. Jap. Bot. 46: 145. 1971. Molendoa sendtneriana (Schimp.) Limpr. var. japonica (Broth.) Iwats., J. Hattori Bot. Lab. 20: 319. 1958.
Plants small, ca. 10 mm high, green to yellowish green, in dense tufts. Stems erect, simple or branched. Leaves narrowly ovate-lanceolate, usually contorted when dry, erect-spreading when moist; margins entire, revolute; costa stout, percurrent; upper leaf cells green, rounded hexagonal, thick-walled, smooth or rarely with single low papilla; basal cells irregularly rectangular, thin-walled, smooth, hyaline. Gemmae present, numerous, club-shaped, often in the leaf axils.
Type. Japan: Nagano Pref., Togakushi, Uematsu 779.
Chinese specimens examined: FUJIAN: Yong-chun Co., D.-K. Li 374 (HKAS, SHM). HENAN: Xin-yang Co., Ji-gong Shan (Mt.), H.-J. Yu 12 (HKAS). QINGHAI: Da-tong Co., J.-M. Liu 6397 (HKAS). SHAANXI: Chang-an Co., M.-X. Zhang 598 (HKAS, WUG); Hu Co., M. Wang 635 (HKAS). SICHUAN: Wen-chuan Co., Y. Xuan 17825 (HKAS). XIZANG: Jiang-zi Co., M. Zang 851b (HKAS). ZHEJIANG: Wen-zhou City, D.-K. Li 5435 (HKAS, SHM).
Habitat: on rocks or soil walls; Distribution: China and Japan.
Illustrations: Pl. 119, figs. 1–6.
