Erect shrub 1-2 m tall; leaves opposite, ovate, ovate-lanceolate or narrowly elliptic, margins entire, 10-18 mm long, 5-9 mm wide, sparsely hairy above, sparsely villous hairy below, petioles about 2 mm long; flowers usually solitary at the end of a short branchlet; calyx tube forming a cup (hypanthium); hypanthium and sepals covered with lanate hairs; sepals 4; petals 4, ovate, white, 8 mm long, 6-7 mm wide; corolla disk-shaped (disciform), 2 cm across; stamens numerous; style bases and hypanthium disk pubescent; each seed short-tailed. Flowers June to August.