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.


Biennial, perennial herb, from taproot, clustered roots, or rhizomes, generally glabrous, generally ± spiny
Stem creeping to erect, rooting at nodes, branched or not
Leaves basal and generally also cauline; petioles 0 or present; blades linear to triangular-ovate or round, generally pinnately or palmately lobed or dissected, rarely entire, often sharply toothed or ciliate, net-veined; juvenile leaves linear, segmented
Inflorescence: heads 1–many in cymes, racemes, or panicles; bracts in 1 or more series, a single bractlet accompanying each flower; rays, pedicels 0
Flower: calyx lobes prominent, persistent on fruit; petals oblong to ovate, white to blue or purple, tip long; projection atop ovary 0
Fruit obovate to round, not compressed to very compressed front-to-back, densely scaly or tubercled or some surfaces glabrous; ribs 0; oil tubes inconspicuous; fruit central axis not an obvious structure
Seed: face generally flat
Species in genus: ± 200 species: Am, Eurasia, Australia, New Zealand
Etymology: (Ancient Greek name used by Theophrastus)
Reference: [Sheikh 1983 Madroño 30:93–101]
CA species (sect. Armata ) are generally in vernal pools, polyploid, poorly defined, apparently interbreeding. Basal leaves are described unless stated otherwise.


E. pinnatisectum Jeps.


Plant erect, 1.5–5 dm, stout, branching from main stem 1.5–2.8 cm above basal rosette, glabrous or roughened in inflorescence
Leaf: petiole << blade; blade 10–30 cm, lanceolate; pinnately sharply lobed, lobes generally opposite, white, margins thickened
Inflorescence: heads 1.5–2 cm, spheric, in cymes; peduncles 0.2–1 cm; bracts 9–11, 1.5–1.7 cm, 2 X heads, linear-lanceolate, prominently white, margins thickened, generally entire; bractlets 9–13 mm
Flower: sepals 3.5–4 mm, entire, lanceolate; petals oblanceolate, white; styles 3.5–4 mm, generally = sepals
Fruit 3–3.5 mm, oblong-ovate; scales dense, unequal, lanceolate, acuminate
Chromosomes: 2n=32
Ecology: UNCOMMON. Vernal pools, wet depressions
Elevation: 250–450 m.
Bioregional distribution: Near boundary of n&c Sierra Nevada Foothills, adjacent Great Central Valley (Sacramento, Amador, Calaveras, Tuolumne cos.).
See the CNPS Inventory for information about endangerment and rarity.
previous taxon | next taxon
bioregional map for ERYNGIUM%20pinnatisectum being generated

Retrieve Jepson Interchange Index to Plant Names entry for Eryngium pinnatisectum
Retrieve dichotomous key for Eryngium
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