Jepson Flora Project: Jepson Interchange    

 
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

APIACEAE

CARROT FAMILY

Lincoln Constance

Annual, biennial, perennial herb (rarely shrub, tree), often from taproot
Stem often ± scapose, generally ribbed, hollow
Leaves basal and generally some cauline, generally alternate; stipules generally 0; petiole base generally sheathing stem; blade generally much dissected, sometimes compound
Inflorescence: umbel or head, simple or compound, generally peduncled; bracts present (in involucres) or not; bractlets generally present (in involucels)
Flowers many, small, generally bisexual (or some staminate), generally radial (or outer bilateral); calyx 0 or lobes 5, small, atop ovary; 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 on top subtending 2 free styles
Fruit: 2 dry, 1-seeded halves that separate from each other but generally remain attached for some time to a central axis; ribs on each half 5, 2 marginal and 3 on back; oil tubes 1–several per interval between ribs
Genera in family: 300 genera, 3,000 species: ± worldwide, especially temp; many cultivated for food or spice (e.g., Carum, caraway; Daucus; Petroselinum); some highly toxic (e.g., Conium). Underground structures here called roots, but true nature remains problematic. Mature fruit generally critical in identification; shapes generally given in outline, followed by shape in X -section of 2 fruit halves together.

CICLOSPERMUM

Annual, taprooted, glabrous
Stem decumbent to erect, generally loosely branched
Leaves: 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 generally 0; rays few; rays, pedicels spreading
Flower: calyx lobes 0; petals oblong, white, tips acutish but not incurved
Fruit narrowly ovate to elliptic, compressed side-to-side, glabrous or hairy; ribs subequal, thread-like to prominent and corky; oil tubes per rib-interval 1; fruit axis shallowly notched
Seed: face flat
Species in genus: 3 species: South America, 1 ± worldwide aggressive weed
Etymology: (Greek: circular seed)

Introduced

C. leptophyllum (Pers.) Britton & E. Wilson

Plant 0.5–6 dm
Leaf 3.5–10 cm; petiole 2.5–12 cm, 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
Chromosomes: 2n=14
Ecology: Lawns, roadsides
Elevation: < 150 m.
Bioregional distribution: California
Distribution outside California: ± worldwide, warm temperate
Flowering time: Apr–Aug
Sporadic in CA
Synonyms: Apium l. (Pers.) Benth

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