Jepson Interchange (more information)
Print edition is available from the University of California Press
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This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants. |
| Jepson Flora Project: Jepson Interchange |
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TREATMENT FROM THE JEPSON MANUAL |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press |
| The second edition of The Jepson Manual (2012) is available from the University of California Press | |
| See also the Jepson eFlora, which parallels the Second Edition |
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.
Perennial, glabrous, often glaucous; roots tuberous, single or clustered, or fibrous, clustered
Stem erect, branched
Leaf: blade lanceolate to triangular-ovate, generally 1–2-ternate-pinnate or 1–2-pinnately or ternate-pinnately dissected, leaflets or segments generally linear to linear-lanceolate
Inflorescence: umbels compound; bracts 0–many, conspicuous and reflexed or not; bractlets several–many, narrow, ± scarious; rays, pedicels few–many, 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 1–several; 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.
| Native |
Plant 1.5–9 dm, green; roots tuberous, single, 1–2.5 cm, fusiform
Leaf: basal petiole 3–10 cm; basal blade 10–20 cm, ± ovate, generally 1-ternate or 1-pinnate with 1–3 pairs of leaflets, leaflets 3–15 cm, ± lanceolate, entire; cauline leaves 1-ternate
Inflorescence: peduncle 3–20 cm; bracts 0–2, bristle-like; bractlets 3–8, 2–4 mm, linear-lanceolate, scarious-margined; rays 5–20, 1–4.5 cm, subequal or unequal, ascending or spreading-ascending; pedicels 3–4 mm; 2° umbels 13–27-flowered
Flower: petals 1-veined; styles 1–1.5 mm
Fruit 2.5–5 mm wide, oblong to ± round; ribs thread-like; oil tubes per rib-interval 3–4
Ecology: Moist meadows, open coniferous forests
Elevation: 2000–3000 m.
Bioregional distribution: Klamath Ranges, Cascade Range, High Sierra Nevada, Transverse Ranges, Peninsular Ranges, East of Sierra Nevada
Distribution outside California: to Nevada, New Mexico
| Native |
Inflorescence: umbels flat or convex on top; rays generally 12–14, subequal; bractlets 6–8, ± = pedicels
Flower: styles 1.5 mm
Fruit 2.5–3.5 mm, ovate to ± round
Chromosomes: 2n=38
Ecology: Wet meadows, open coniferous forests
Elevation: 2000–3000 m.
Bioregional distribution: Klamath Ranges, Cascade Range, High Sierra Nevada, Transverse Ranges, Peninsular Ranges, East of Sierra Nevada
Distribution outside California: Nevada
| YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps). |
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