|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
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 1several 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.
Perennial, glabrous, often glaucous; roots tuberous, single or clustered, or fibrous, clustered
Stem erect, branched
Leaf: blade lanceolate to triangular-ovate, generally 12-ternate-pinnate or 12-pinnately or ternate-pinnately dissected, leaflets or segments generally linear to linear-lanceolate
Inflorescence: umbels compound; bracts 0many, conspicuous and reflexed or not; bractlets severalmany, narrow, ± scarious; rays, pedicels fewmany, generally spreading-ascending; 2° umbels generally convex on top
Flower: calyx lobes evident; petals generally obovate, white, tips narrowed
Fruit linear-oblong to round, slightly compressed side-to-side or not at all, glabrous; ribs subequal, thread-like to prominent, not winged; oil tubes per rib-interval 1several; fruit axis divided to base
Seed: face flat to grooved
Species in genus: ± 12 species: generally w Am
Etymology: (Greek: around the neck, from involucre)
Reference: [Chuang & Constance 1969 Univ Calif Publ Bot 55]
Roots, basal leaves needed for identification.
Plant 517 dm; roots tuberous, 26-clustered, 26 cmSee the CNPS Inventory for information about endangerment and rarity.
Leaf: basal petiole 620 cm; basal blade 2040 cm, ± ovate, generally 2-pinnate, leaflets 215 cm, linear-lanceolate, generally entire, acute; cauline leaves generally 1-pinnate
Inflorescence: peduncle 325 cm; bracts 1 or 2, very narrow; bractlets 1216, 0.515 cm, linear-lanceolate, sharply reflexed; rays 47, 36 cm, unequal, spreading-ascending; pedicels 38 mm; 2° umbels generally spheric, 4050(60)-flowered
Flower: petals 1-veined; styles 0.71.2 mm
Fruit 46 mm, oblong; ribs thread-like; oil tubes per rib-interval 1
Ecology: UNCOMMON. Chaparral, pine woodland
Elevation: 4501000 m.
Bioregional distribution: n&c Sierra Nevada Foothills.