Fls perfect; tep 5, petaloid, unequal in width, connate toward the base; stamens 8; ovary 3-angled; styles 3, with capitellate stigma; fr a trigonous achene, much exceeding the persistent but scarcely enlarged cal; embryo within the endosperm, with broad, often folded cotyledons; annual herbs with alternate, petiolate, broadly triangular lvs and obliquely truncate ocreae; fls white or pink, pediceled in fascicles disposed in racemes arising from the axils of short bracts. 15, temp Eurasia.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.