General:
Large shrub or small tree 2-10 m tall, with short stout thorns about 1 cm long; twigs greyish to reddish-brown, smooth; bark dark grey-brown, scaly.
Leaves:
Alternate, deciduous, long-stalked, smooth except for patches of hairs on the veins beneath, egg-shaped in outline, the blades 1.5-3.5 cm long, deeply 3- to 7-lobed, the lobes usually reaching more than halfway to the midrib, few-toothed, the veins running to the sinuses as well as to the tips of the lobes.
Fruits:
Berry-like pomes (like miniature apples), globe- to egg-shaped, 8-10 mm long, deep red; stones (nutlets) 1, 1-seeded.
Source: The Illustrated Flora of British Columbia