Habit: Perennial herb, from taproot or generally deep-seated tuber, glabrous to tomentose.
Stem: 0 or erect, simple or branched; base fibrous or not.
Leaf: blade oblong to triangular-ovate or obovate, ternately, pinnately, or ternate-pinnately dissected or compound, segments or leaflets thread-like to wide; old basal leaf sheaths fibrous-persistent or not.
Inflorescence: umbels compound, peduncled; bracts generally 0; bractlets generally present, 0 to conspicuous; rays, pedicels spreading to erect, generally webbed at base.
Flower: calyx lobes generally 0; petals wide, yellow, white, or purple, tips narrowed; ovary tip projection 0.
Fruit: linear to obovate, compressed front-to-back; marginal ribs widely to narrowly thin or thick-winged, others thread-like, wings generally not incurved; oil tubes 1--several per rib-interval; fruit axis divided to base or a corky ridge along the middle of each fruit half.
Seed: face flat to concave.
Species In Genus: +- 75 species: central and southern North America.
Etymology: (Greek: bordered, from prominent marginal fruit wing)
Note: Fruit wing width given as width of 1 wing, not both together.
Jepson eFlora Author: Lincoln Constance & Margriet Wetherwax
Reference: Feist et al. 2017 Phytotaxa 316:95--98.
Unabridged Reference: Carlson et al. 2011 Aliso 29:105--114; Constance & Ertter 1996 Madroño 43:515--521; Schlessman 1984 Syst Bot Monogr 4:1--55; Matthias 1938 Ann Missouri Bot Gard 25:225--297.Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)Key to Lomatium
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