Fr ovate to orbicular, flattened laterally, the ribs 5 per mericarp, prominent and sometimes very narrowly winged; oil-tubes 2-4 in the intervals, 2 or more on the commissure; carpophore bifid at least to the middle; umbels peduncled, compound, terminal and lateral; invol usually none; rays 8-20; sep minute or none; fls white, pink, or purple, the marginal ones sometimes irregular; stylopodium ±conic; perennials with pinnate or decompound lvs. 150, mainly Old World.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.