UW Burke Herbarium species comparison

Leaves trifoliate, the leaflets ovate, nearly glabrous, doubly serrate, the terminal one 4-9 cm. long, the others smaller, often lobed.

Leaves 2-5 per stem, with conspicuous ovate-lanceolate, entire stipules;

leaf blades trifoliate, the leaflets ovate to obovate, 1.5-3 cm. long, serrate to bi-serrate.

Flowers 1-2 on short leafy branches;

calyx pubescent, the 5 lobes ovate-lanceolate, pointed, spreading, 9-15 mm. long;

petals 5, purplish-red, obovate-elliptic, half again as long as the sepals;

stamens 75-100;

pistils numerous.

Flowers terminal, usually single, rarely 2;

calyx finely pubescent, the 5 lobes narrowly lanceolate, reflexed, 8-11 mm. long;

petals 5, erect, pink to crimson or rose, spatulate-obovate, 10-16 mm. long;

stamens 30-40;

pistils 20-30, the style enlarged upward.

Drupelets yellow to reddish, weakly coherent, coming free from the receptacle.

Drupelets coherent, coming free of the receptacle, the fruit reddish, globose, 1 cm. broad.