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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

AMMI
Annual, biennial, taprooted, glabrous. Stem: erect, branched. Leaf: blade oblong to ovate, pinnately or ternately dissected, segments lanceolate to thread-like. Inflorescence: umbels compound; bracts, bractlets many, leaf-like; rays, pedicels many, spreading-ascending to incurved in fruit. Flower: calyx lobes minute; petals wide, white, tips 2-lobed. Fruit: oblong to ovate, ± cylindric, compressed side-to-side; ribs ± equal, thread-like; oil tube 1 per rib-interval; fruit axis entire or divided. Seed: face flat.
± 6 species: Eurasia, Mediterranean. (Ancient name used by Dioscorides) TOXIC: rarely eaten by livestock.

Key to Ammi

A. majus L.
NATURALIZED
Plant 2–8 dm. Leaf: petiole 1–5 cm; blade 6–20 cm, oblong, segments 10–15 mm; cauline leaves 2-pinnately dissected. Inflorescence: scabrous; peduncle 8–14 cm; rays 20–60, 2–7 cm, slender; pedicels 1–10 mm. Fruit: 1.5–2 mm, oblong.
2n=22. Fields, roadsides, disturbed areas; generally < 1000 m. North Coast, Outer North Coast Ranges, Sacramento Valley; native to Eurasia. May–Jul [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 31 2014
Citation for this treatment: [Author of taxon treatment] 2013. Ammi, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=13036, accessed on Jul 31 2014

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click for enlargement Ammi majus
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2007 Luigi Rignanese

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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.