A tall, deciduous shrub, shoots soon glabrous. Leaves elliptic-lanceolate, tapered to both ends, 2 to 4 in. long, 1⁄4 to 11⁄8 in. wide, glabrous above, at first covered beneath with grey-white hairs. Flowers small, 1⁄4 in. across, white, borne in axillary and terminal, downy cymes on short, leafy side-shoots. Fruits obovoid, 2⁄5 in. long, dark purple.
Native of N. India, first collected in 1914 and named after R. E. Cooper of the Edinburgh Botanic Garden. It is very closely allied to C. affinis var. bacillaris.
var. microcarpa Marquand – Although undistinguishable in leaf and flower from the type, the fruits are smaller, more globose, and of a much redder purple. Bot. Mag., t. 9478.