Fleshy perennial herbs, with erect, mostly simple stems, broad, rather thin dentate or entire leaves and dioecious or polygamous, yellow, greenish or purplish flowers in terminal cymes. Flowers 4-parted or 5-parted. Calyx shorter than the petals. Carpels distinct, erect. Style very short or none. [Greek, rose, referring to the rose-scented roots.]

About 8 species, natives of the north temperate zone. Besides the following, 4 others occur in western North America and 1 on Roan Mountain, North Carolina. Type species: Rhodiola rosea L.

1. Rhodiola Rosea L. Roseroot. Rosewort. Fig 2133

Rhodiola rosea L. Sp. Pl. 1035. 1753.

Sedum roseum Scop. Fl. Cam. Ed. 2, 326. 1772.

Sedum Rhodiola DC. Plantes Gras. pl. 143. 1805.

Perennial, branched at the base, or simple, erect or ascending, glabrous and somewhat glaucous, 4'-12' high. Leaves sessile, oval or slightly obovate, acute or obtuse at the apex, narrowed or rounded at the base, dentate or entire, 6"-12" long. 3"-5" wide, the lower ones smaller; cyme terminal, dense, •-2' broad; flowers dioecious, yellowish-green or purplish, 2 1/2"-4" broad; sepals oblong, narrower and shorter than the petals; staminate flowers with 8 (rarely 10) stamens, the pistillate ones with 4 (rarely 5) carpels; follicles purple, about 2" long, only their tips spreading.

In rocky places, Labrador and arctic America to Maine and Vermont; Chittenango Falls, New York; cliffs on the Delaware River in eastern Pennsylvania. Northern and alpine Europe and Asia. Root rose-scented. Snowdon rose. May-July.

1 Rhodiola Rosea L Roseroot Rosewort Fig 2133 475