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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.


Perennial herb, ± glabrous to hairy; roots thick, clustered, licorice-scented. Stem: branched, leafy. Leaf: blade oblong to triangular-ovate, 2-pinnate or ternate-pinnate or 2–3-ternate, leaflets lanceolate to round. Inflorescence: umbels compound; bracts 0; bractlets 0–several, conspicuous; rays, pedicels few, spreading-ascending to spreading. Flower: calyx lobes 0; petals obovate, white, purple, or ± green-yellow (± green-white), tips narrowed; disk occasionally present. Fruit: linear to oblong, cylindric to club-shaped, ± compressed side-to-side, bristly to glabrous; base obtuse or long-tapered into tail, tip tapered into beak or obtuse; ribs thread-like; oil tubes obscure; fruit axis divided in distal 1/2. Seed: face concave or grooved.
± 10 species: America, eastern and southern Asia. (Greek: sweet root) [Lowry & Jones 1985 Ann Missouri Bot Gard 71:1128–1171]

Key to Osmorhiza

1. Fruit not long-tapered at base, glabrous; leaf 2-pinnate ..... O. occidentalis

1' Fruit long-tapered into tail at base, bristly; leaf 2–3-ternate

2. Involucel conspicuous; corolla ± green-yellow ..... O. brachypoda

2' Involucel 0 or vestigial; corolla white or purple (± green-white)

3. Fruit club-like, beakless; rays, pedicels spreading ..... O. depauperata

3' Fruit linear-fusiform or -oblong, beaked; rays, pedicels spreading-ascending

4. Ovary tip projection conic; disk 0; fruit 12–25 mm; corolla white ..... O. berteroi

4' Ovary tip projection depressed-conic; disk conspicuous; fruit 8–15 mm; corolla purple (± green-white) ..... O. purpurea


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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