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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

CYCLOSPERMUM
Annual, taprooted, glabrous. Stem: decumbent to erect, generally loosely branched. Leaf: sessile or petioled; blade oblong to triangular-ovate, pinnately or ternate-pinnately dissected or compound, segments or leaflets generally thread-like to linear. Inflorescence: umbels compound or some simple; bracts, bractlets 0; rays few; rays, pedicels spreading. Flower: calyx lobes 0; petals oblong, white, tips not incurved. Fruit: elliptic to narrowly ovate, compressed side-to-side, glabrous [hairy]; ribs ± equal, thread-like to prominent and corky; oil tube 1 per rib-interval; fruit axis shallowly notched. Seed: face flat.
3 species: South America, 1 ± worldwide aggressive weed. (Greek: circular seed) "Ciclospermum" in TJM (1993).

C. leptophyllum (Pers.) Britton & P. Wilson
NATURALIZED
Plant 0.5–6 dm. Leaf: 3.5–10 cm; petiole 2.5–12 mm, generally 0 on cauline leaves, sheath margin scarious; segments 3–15 mm, thread-like to linear, entire. Inflorescence: < 2 cm, generally some sessile; rays 1–3; pedicels 6–20, 2–16 mm, spreading. Fruit: 1.2–3 mm wide, elliptic to ovate.
2n=14. Roadsides; < 350 m. Outer North Coast Ranges, Great Central Valley, c Central Coast, San Francisco Bay Area, Outer South Coast Ranges, South Coast; ± worldwide, warm temperate. Apr–Aug [Online Interchange]
Unabridged synonyms: [Apium leptophyllum (Pers.) Benth.]
Unabridged note: Expanded author citation: Cyclospermum leptophyllum (Pers.) Sprague ex Britton & P. Wilson

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Next taxon: Cymopterus

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Apr 24 2014
Citation for this treatment: [Author of taxon treatment] 2012. Cyclospermum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=88944, accessed on Apr 24 2014

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Bioregions in which Cyclospermum leptophyllum occurs 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.
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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.