日本景天 ri ben jing tian

Sedum chrysastrum Hance; S. uniflorum Hooker & Arnott subsp. japonicum (Siebold ex Miquel) H. Ohba.

Herbs perennial, creeping. Sterile shoots 2-4 cm. Flowering stems many branched, ascending, slender, 10-20 cm. Leaves alternate, remote, sessile, linear-spatulate, terete to ± flat, 7-10 × 0.2-0.3 cm, base shortly spurred, apex obtuse. Cyme 3-branched, corymbiform, 4-8 cm in diam. Flowers unequally 5-merous; pedicel thick, short. Sepals linear-oblong to subtriangular, 2-4 mm, base shortly spurred, apex obtuse. Petals yellow, oblong-lanceolate, 6-7 × ca. 1.5 mm, apex acuminate. Stamens 10; antesepalous ones subequaling or longer than petals; antepetalous ones slightly shorter than petals, inserted ca. 1.2 mm from petal base. Nectar scales minute, base broadly cuneate, apex rounded-truncate. Carpels lanceolate, ca. 5 mm, base connate for ca. 2 mm. Styles ca. 1 mm. Follicles horizontally stellately divergent. Fl. May-Jun, fr. Jul-Aug.

Shady moist places on slopes; below 1000 m. Anhui, Guangdong, Hunan, Jiangxi, Taiwan, Zhejiang [Japan].

Sedum jiaodongense Y. M. Zhang & X. D. Chen (Bull. Bot. Res., Harbin 10(1): 43. 1990), described from E Shandong (Rongcheng Xian: Longxu Island), may possibly be synonymous with this species.