Fr subglobose, hard, scarcely separable into mericarps; primary and secondary ribs about equally developed, low, narrow, obtuse; oil-tubes none; carpophore bifid to the base; umbels terminal and lateral, compound, with 3-8 rays; invol none or of one narrow bract; umbellets small, few-fld; bractlets 3, small, linear, all at the outer side of the umbellet; sep unequal, those toward the periphery of the umbellet much the larger; pet white, pink, or purple, obcordate, the outer ones of the peripheral fls much the larger; stylopodium conic; annuals with pinnately decompound lvs. 2, Medit.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.