Sep short-oblong, ascending; pet white, obovate; short stamens flanked by a pair of minute glands; ovary flat, obovate; ovules 6-many per locule; style very short; frs strongly flattened at right angles to the septum, triangular-obcordate, truncate to broadly notched at the summit, commonly narrowly winged distally; annual or biennial herbs, pubescent with stellate hairs, with a tuft of basal lvs and a few reduced cauline lvs on the branching stems. Monospecific.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.