Phedimus kamtschaticus (Fisch. & C. A. Mey.) H. 't Hart

Herbs perennial. Rootstock branched, thickened, woody. Stems mostly simple, ascending, 15-40 cm, sometimes papillate. Leaves alternate or opposite, rarely 3-verticillate; leaf blade oblanceolate, spatulate, or obovate, 2.5-7 × 0.5-3 cm, base narrowly cuneate, margin apically sparsely serrate to crenate, apex obtuse-rounded. Inflorescence terminal. Flowers unequally 5-merous. Sepals lanceolate, 3-4 mm, base broad, apex obtuse. Petals yellow, lanceolate, 6-8 mm, abaxially keeled, apex acuminate and mucronate. Stamens 10, slightly shorter than petals; anthers orange. Nectar scales subquadrangular, minute. Carpels erect, equaling or slightly shorter than petals, adaxially gibbous, base connate for ca. 2 mm. Follicles stellately horizontal. Seeds brown, obovoid, minute. Fl. Jun-Jul, fr. Aug-Sep.

Hebei, Heilongjiang, Jilin, Liaoning, Nei Mongol [Japan, Korea, Russia].

Rocky slopes; 600-1800 m.

Sedum kamtschaticum Fischer & C. A. Meyer, Index Sem. Hort. Petrop. 7: 54. 1840; Aizopsis kamtschatica (Fischer) Grulich; Sedum aizoon Linnaeus subsp. kamtschaticum (Fischer) Fröderström.

Phedimus kamtschaticus, the orange stonecrop, is a species of flowering plant in the family Crassulaceae. It is native to China, Korea, Japan and the Russian Far East north to Chukotka, and has been introduced to the state of New York, Norway, Germany, Austria, and the Baltic States.

Under its synonym Sedum kamtschaticum it has gained the Royal Horticultural Society's Award of Garden Merit. In addition, the putative variety Sedum kamtschaticum var. ellacombeanum and the 'Variegatum' cultivar have also gained the award.