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.



David J. Keil, Family Editor and author, except as specified

Annual to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1–many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1–many per head
Flowers bisexual, unisexual, or sterile, ± small, of several types; calyx 0 or modified into pappus of bristles, scales, or awns, which is generally persistent in fruit; corolla radial or bilateral (rarely 0), lobes generally (0)4–5; stamens 4–5, anthers generally fused into cylinder around style, often appendaged at tips, bases, or both, filaments generally free, generally attached to corolla near throat; pistil 1, ovary inferior, 1-chambered, 1-seeded, style 1, branches 2, generally hair-tufted at tip, stigmas 2, generally on inside of style branches
Fruit: achene, cylindric to ovoid, generally deciduous with pappus attached
Genera in family: ± 1300 genera, 21,000 species (largest family of dicots): worldwide. Largest family in CA. Also see tribal key to CA genera: Strother 1997 Madroño 44(1):1–28. See glossary p. 25 for illustrations of general family characteristics.



Elizabeth McClintock

Annual, perennial herb, sometimes woody at base, often aromatic, glabrous or hairy
Stems decumbent or erect, branched
Leaves alternate, dissected
Inflorescence: heads disciform, radiate, or discoid, few–many; phyllaries in 2–3 overlapping series; receptacle convex to conic, generally dotted with tubercles
Pistillate or ray flowers many; corollas tubular or with inconspicuous to well developed ligules, yellow or white
Disk flowers many; corollas tubular, yellow; anther tips ovate, bases rounded or ± cordate; style branches truncate with shrub-like tips
Fruit generally 3–10-ribbed; pappus a crown of short scales
Species in genus: 70 species: Eur, Asia, North America
Etymology: (Latin: immortality)
See also Sphaeromeria.


T. vulgare L.


Perennial, coarse, aromatic, glabrous to sparsely hairy; rhizome stout, creeping
Stems < 1 m, ridged, leafy, branched
Leaves 4–10 cm, ovate in outline, sessile or short-petioled, pinnately divided; 1° leaf divisions generally 4–10 pairs, lanceolate, regularly toothed or lobed, gland-dotted
Inflorescence: heads disciform, < 70 in a much divided, generally flat-topped cluster; phyllaries in 3 series, outermost lanceolate, inner oblong
Pistillate flowers: corollas 3–4-lobed, yellow
Disk flowers: corollas 2–3 mm, yellow
Fruit 1 mm, 5-angled, gland-dotted; pappus a narrow-toothed crown
Chromosomes: 2n=18
Ecology: Uncommon. Escape from cultivated in disturbed, generally urban areas
Bioregional distribution: North Coast, Outer North Coast Ranges, High Cascade Range, Outer South Coast Ranges
Distribution outside California: native to Europe
TOXIC: dried leaves and flowers have been used medicinally, especially in home remedies; overdoses may be very toxic; also causes contact dermatitis.

previous taxon | next taxon
bioregional map for TANACETUM%20vulgare being generated

Retrieve Jepson Interchange Index to Plant Names entry for Tanacetum vulgare
Retrieve dichotomous key for Tanacetum
Retrieve multiple-entry key (MEKA) for Tanacetum
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