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An evergreen shrub, varying considerably in height and habit. The largest form is 2 to 4 ft high, and of thin, open growth, the smallest a dwarf, tufted plant 6 in. or so high; young wood slightly downy. Leaves in pairs or in threes, oval or ovate, 3⁄4 to 2 in. long, 1⁄4 to 3⁄4 in. wide, glabrous and bright green above, paler or semi-glaucous beneath; stalk 1⁄6 to 1⁄3 in. long. Flowers produced in June, densely packed in rounded clusters 2 in. across at the termination of the previous year’s growth. Corolla saucer-shaped, 1⁄3 in. across, deep rosy-red; lobes five, shallowly triangular. Calyx and flower-stalks downy and glandular. Bot. Mag., t. 331
Native of eastern N. America; introduced in 1736. It spreads by sucker growths at the base, and the dwarfer forms are dainty shrubs. Propagated by seed or by pulling old plants apart in spring.