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FOC | Family List | FOC Vol. 8 | Crassulaceae | Rhodiola

44. Rhodiola pinnatifida Borissova in Komarov, Fl. URSS. 9: 475. 1939.

羽裂红景天 yu lie hong jing tian

Sedum pinnatifidum (Borissova) J. P. Kozhevnikov.

Main root few branched, thick, fusiform. Caudex 1-1.5 × 1-2 cm. Caudex leaves scalelike, oblong-triangular, 4-5 × ca. 3 mm, apex acute. Flowering stems few, erect, 10-20 cm × 3-4 mm, densely leafy. Stem leaves alternate, subopposite, or nearly 3-verticillate, linear-lanceolate to lanceolate, 2-3.5 × 0.3-0.5 cm, base attenuate, apex acute. Inflorescences corymbiform-umbellate, compact, 1.5-2 × 2.5-3 cm, many flowered. Flowers unisexual, unequally 4-merous in male plants, shorter than pedicel. Sepals yellowish green, lanceolate, ca. 4 mm, apex subacute. Petals yellow, lanceolate to oblong-lanceolate, ca. 6 mm, apex subobtuse. Stamens 8, ca. 9 mm, ca. 1.5 × as long as petals; filaments yellow; anthers greenish yellow, globose. Nectar scales ca. 1 × 0.5 mm. Follicles oblong-lanceolate, to 8 mm, apical beak 1-2 mm. Seeds brown, oblong, to 2 mm. Fl. Jun-Aug, fr. Jul-Aug.

About 2200 m. N Xinjiang (Altay Shan) [Mongolia, Russia].

Rhodiola pinnatifida falls within the range of variation of R. stephanii and is therefore difficult to separate from the latter species. Further study is needed to determine whether or not the two are conspecific.


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