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Prostrate or low shrub, usually less than 0.2 m; bud scales persistent. Leaves 1-6 x 4-2.2 cm, obovate or spathulate, apex rounded, with a glandular apiculus, margin toothed and ciliate, lower surface pubescent on veins, otherwise glabrous. Flowers solitary or to 3, in a raceme, the peduncle bearing leafy bracts; calyx 8-18 mm, lobes oblong; corolla rose-purple (rarely white), with darker flecks, rotate, divided to the base on the lower side, 20-25 mm; stamens 10; ovary pubescent, style pubescent at base. Flowering May-June. Royal Horticultural Society (1997)
Distribution Japan N Russia E United States Aleutian Islands, Alaska
RHS Hardiness Rating H5
Conservation status Least concern (LC)
Taxonomic note Subgen. Therorhodion Royal Horticultural Society (1997)
This should have been cross-referenced, to Therorhodion in Volume IV, page 577.
Corolla lobes pubescent outside, margin ciliate; leaves of vegetative shoots without or with sparse glandular hairs.
Distribution Japan (N Honshu, Hokkaido), Russia (Kamtschatka, Kuriles), USA (Aleutian Islands, S Alaska).
R. glandulosum Small
Corolla lobes glabrous outside, margins not ciliate; Leaves of vegetative shoots glandular-hairy.
Distribution Russia (E Siberia), USA (W Alaska).
This species is very distinctive on account of the leafy peduncles and the form of the corolla. Both subspecies are probably in cultivation.