Sedum japonicum Siebold ex Miquel f. rugosum Fröderström; S. uniflorum Hooker & Arnott subsp. rugosum (Fröderström) K. T. Fu.

Herbs perennial. Rhizome short, basally with fibrous roots, apically with numerous shoots. Sterile shoots present. Stems erect, ca. 7 cm, basally leafless. Leaves alternate, imbricate, sessile, ovate, 3-4 × 1.5-2 mm, base rounded and spurred, apex obtuse to acute. Cyme corymbiform, ca. 1.5 cm in diam.; bracts linear. Flowers sessile, unequally 5-merous. Sepals ovate to lanceolate, 2.5-3 × ca. 1.2 mm, base spurred, apex obtuse to acute. Petals lanceolate, 3-3.5 × ca. 1 mm, apex mucronate. Stamens 10, shorter than petals; antepetalous ones inserted ca. 1 mm from petal base; filaments ca. 2 mm; anthers yellow. Nectar scales quadrangular, ca. 0.4 × 0.6 mm, apex obtuse. Carpels divergent, ovoid-lanceolate, subequaling stamens. Styles slender, ca. 0.8 mm. Follicles stellately horizontally spreading, 10-12-seeded, base connate for ca. 0.5 mm. Fl. Jun.

* Exposed poor soils; 1300-2400 m. NC Sichuan (Maowen Qiang Zu Zizhixian, Wenchuan Xian).