Rhodiola semenovii (Regel & Herd.) Boriss.

Main roots brown, straight. Caudex erect, clustered, slightly enlarged; persistent old flowering stems few. Caudex leaves scalelike, suboblong, apex obtuse. Sterile stems 2-3 cm, densely leafy. Flowering stems few, tufted, 7-8 cm. Stem leaves narrowly linear, less than 10 mm. Inflorescences corymbiform, dense. Flowers bisexual, pedicellate or sessile, unequally 5-merous. Sepals linear, ca. 3.8 mm, apex acuminate. Petals oblong, 6-6.5 mm, apex galeate and mucronate. Stamens 10; antesepalous ones ca. 4.5 mm; antepetalous ones ca. 2.2 mm, inserted ca. 2 mm from petal base; anthers ca. 0.8-0.9 mm. Carpels erect. Seeds oblong. Fl. Jun-Jul.

Caudex branched, short. Caudex leaves scalelike, triangular. Flowering stems numerous, simple, erect, 35-60 cm × 5-6 mm, densely leafy. Stem leaves 3.5-7 × 0.2-0.3 cm, margin entire or sparsely serrate, apex acuminate. Inflorescences cylindric racemes. Flowers shortly pedicellate or sessile, bisexual, unequally 4- or 5-merous. Sepals linear, ca. 3 mm, apex acuminate. Petals white or red, lanceolate, ca. 7 × 2 mm. Stamens 8 or 10, equaling petals; filaments white; anthers red. Nectar scales subquadrangular, ca. 1 × 1.3 mm. Carpels erect, 0.8-1.2 cm. Follicles red. Seeds ovoid, ca. 1 mm, winged. Fl. Jun-Jul.

Gansu (Lanzhou Shi).

W Xinjiang [Kazakhstan].

* Rocks on mountain slopes; 2300-3200 m.

Beside water; 1800-2900 m.

Sedum semenovii (Regel & Herder) Masters var. kansuense Fröderström, Oesterr. Bot. Z. 87: 120. 1938.

Umbilicus semenovii Regel & Herder, Bull. Soc. Imp. Naturalistes Moscou 39: 65. 1866; Clementsia semenovii (Regel & Herder) Borissova; Sedum semenovii (Regel & Herder) Masters; Umbilicus linearifolius Franchet; U. linifolius Osten-Sacken & Ruprecht.