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APIACEAE (Umbelliferae) CARROT FAMILY

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

CONIOSELINUM
Perennial herb, taprooted or short-rhizomed, glabrous or ± scabrous in inflorescence. Stem: erect, branched. Leaf: blade ovate to widely triangular, 1–4-pinnately or -ternate-pinnately dissected or compound; segments or leaflets toothed or lobed to deeply cut; sheaths conspicuously dilated. Inflorescence: umbels compound; bracts generally 0; bractlets generally present, ± scarious; rays, pedicels many, spreading-ascending. Flower: calyx lobes 0 or minute; petals wide, white, tip notched. Fruit: oblong to ovate, compressed front-to-back; marginal ribs thin-winged, wide, abaxial low, corky, or all ribs winged; oil tubes 1–4 per rib-interval; fruit axis divided to base. Seed: face flat or ± concave.
± 10 species: North America, Eurasia. (Combined generic names Conium + Selinum)

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Next taxon: Conioselinum pacificum

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Aug 30 2014
Citation for this treatment: [Author of taxon treatment] 2013. Conioselinum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=10176, accessed on Aug 30 2014

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