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Previous taxon Indexes to all accepted names and synonyms:
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Lincoln Constance & Margriet Wetherwax, except as noted

Annual to perennial herb [shrub, tree], generally from taproot. Stem: generally ± scapose, generally ribbed, hollow. Leaf: basal and generally cauline, generally alternate; stipules generally 0; petiole base generally sheathing stem; blade generally much dissected, occasionally compound. Inflorescence: umbel or head, simple or compound, generally peduncled; bracts present in involucres or 0; bractlets generally present in "involucels". Flower: many, small, generally bisexual (or some staminate), generally radial (or outer bilateral); calyx 0 or lobes 5, small; petals 5, free, generally ovate or spoon-shaped, generally incurved at tips, generally ± ephemeral; stamens 5; pistil 1, ovary inferior, 2-chambered, generally with a ± conic, persistent projection or platform at tip subtending 2 free styles. Fruit: 2 dry, 1-seeded halves (= mericarps), separating from each other but generally ± persistent to central axis; ribs on halves 5, 2 marginal, 3 to back; oil tubes 1–several per interval between ribs.
300 genera, 3000 species: ± worldwide, especially temperate; many cultivated for food or spice (e.g., Carum, caraway; Daucus; Petroselinum); Bupleurum lancifolium Hornem. is historical garden weed; some toxic (e.g., Conium). Mature fruit generally critical in identification, shape given in outline. Hydrocotyle moved to Araliaceae. Petroselinum crispum (Mill.) A.W. Hill is a waif. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.

Key to Apiaceae

Perennial herb, glabrous; tubers clustered. Stem: erect, generally branched. Leaf: blade oblong [linear, triangular-ovate], pinnate, [simple, ternate]; main axis segmented, hollow, occasionally bladeless. Inflorescence: umbels compound; involucre, involucel variable; bracts, bractlets 0 or 1–several, ± inconspicuous; rays, pedicels few to many, spreading-ascending. Flower: calyx lobes evident [minute] but not a persistent crown on fruit; petals wide, white, tips narrowed. Fruit: oblong to obovate, compressed front-to-back; ribs unequal, marginal widely thin-winged, wings veined on back at inner margin, others thread-like; oil tube 1 per rib-interval; fruit axis divided to base.
± 6 species: western and eastern United States, Caribbean. (Greek: sharp white)

O. occidentalis J.M. Coult. & Rose
Plant 6–15 dm. Leaf: petiole 1–5 dm; blade 12–30 cm, oblong, 1-pinnate, leaflets 5–13, 3.5–9.5 cm, lanceolate to widely ovate, crenate to serrate or irregularly cut; cauline leaves with enlarged petiole, smaller leaflets than basal. Inflorescence: peduncle 6–30 cm; bracts 0–1(8), 5–20 mm, linear, scarious; bractlets like bracts, < 10 mm; rays 12–24, 2–8.5 cm; pedicels 3–15 mm. Flower: calyx lobes conspicuous. Fruit: 5–6 mm, oblong or ovate.
2n=36. Bogs, wet meadows, stream sides, generally in conifer forest; < 2700 m. Cascade Range Foothills, Sierra Nevada, San Gabriel Mountains, San Bernardino Mountains, White and Inyo Mountains; Oregon, British Columbia. Jul–Aug [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Nov 29 2015
Citation for this treatment: [Author of taxon treatment] 2013. Oxypolis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Nov 29 2015

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click for enlargement Oxypolis occidentalis
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2001 Steven Thorsted

Geographic subdivisions indicated for the distribution of Oxypolis occidentalis Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.