Ribes irriguum Douglas, Trans. Hort. Soc. London 7: 516. 1830; Grossularia irrigua (Douglas) Coville & Britton; R. oxyacanthoides subsp. irriguum (Douglas) Q. P. Sinnott

Stems: spines at nodes 1(-3); internodal prickles absent or few. Leaf blades 2-3 cm, base truncate to cordate, surfaces finely pubescent or abaxially glabrous, lobes rounded, margins irregularly 1 or 2 times shallowly incised and crenate-serrate. Peduncles 6-15 mm. Pedicels 3-6 mm, glabrous. Flowers: hypanthium green, campanulate or short-tubular, 2-4 mm, glabrous; sepals pale greenish or with some reddish or purplish tinge at least near base, oblong, 4.5-5.5 mm, apex rounded to obtuse, glabrous; petals white or slightly pinkish, obovate, 2-3.5 mm, base cuneate, apex rounded, often erose; filaments 2-3.5 mm; styles 6.5-8 mm.

Flowering Mar-Jun. Canyons, hillsides, moist forests, glades, thickets; 900-1600 m; B.C.; Idaho, Mont., Oreg., Wash.