Perennial, glabrous or pubescent herbs from taproots or tubers; stems erect, branched or simple, the leaves petiolate, once or more ternate, pinnate, or ternate-pinnate, the petiole sheathing; inflorescence of terminal and lateral compound umbels, the fertile rays few to numerous, an involucre usually lacking, an involucel commonly present; flowers white to purple or greenish or greenish-yellow, the petals with an inflexed apex, the calyx obsolete; stylopodium conical to indistinct, the styles long or short, the carpophore parted to the base or merely bifid; fruit compressed laterally, usually narrowed at apex, all ribs prominent, acute or obtuse, or filiform and indistinct, the vittae solitary to several in the intervals, 2 or several on the commissure; seed subterete, often sulcate beneath the vittae, its face sulcate or concave.
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