Hypanthium small, broadly cupulate; sep 5, small, erect; pet 5, narrowly oblong; stamens 5; filaments pubescent; ovary superior, bilocular, longitudinally 2-grooved, hairy; style grooved; stigma capitate; fr an indurate capsule, at first 2-grooved, tipped with the persistent style, eventually septicidal to the summit of the style; shrubs with chambered pith, superposed axillary buds, pinnately veined, serrulate lvs and slender, terminal racemes of small white fls. 20, e. U.S., e. Asia, w. Malaysia.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.