Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

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



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.


Annual, biennial, taprooted, hairy
Stem decumbent or erect, generally ± branched
Leaf: blade oblong, pinnately dissected, segments linear to lanceolate
Inflorescence: umbels compound; bracts, bractlets generally present; bracts conspicuous, generally pinnately lobed; bractlets entire to toothed; rays generally many, spreading, in fruit incurving to form a nest-like umbel
Flowers: outer sometimes ± bilateral; calyx lobes 0 or evident; petals wide, white, tips narrowed, unequally 2-lobed
Fruit oblong to ovate, compressed front-to-back; ribs 10, 1° thread-like and bristly, 2° winged and prickly; oil tubes 1 beneath each 2° ribs; fruit axis entire or notched at tip
Species in genus: ± 20 species: Am, Eurasia, n Africa, Australia
Etymology: (Greek: carrot)
Reference: [Sáenz Laín 1980 Ann Jard Bot Madrid 37:481–533]


D. pusillus Michx.

Plant 0.3–9 dm, generally simple or few-branched
Leaf: petiole 4–15 cm; blade 3–10.5 cm, segments 1–5 mm, linear, acute, entire, ± bristly
Inflorescence: peduncles 1–4.5 cm, bristles reflexed to spreading; rays 0.4–4 cm; pedicels 2–9 mm
Fruit 3–5 mm, oblong
Chromosomes: n=22
Ecology: Rocky or sandy places
Elevation: 0–1500 m.
Bioregional distribution: California Floristic Province (especially coastal), Desert Mountains
Distribution outside California: to British Columbia, se US, S.America
Flowering time: Apr–Jun

previous taxon | next taxon
bioregional map for DAUCUS%20pusillus being generated

Retrieve Jepson Interchange Index to Plant Names entry for Daucus pusillus
Retrieve dichotomous key for Daucus
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page

University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California