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|
|TREATMENT FROM THE JEPSON MANUAL||
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Jepson Interchange (more information)
©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 to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1many 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)45; stamens 45, 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):128. See glossary p. 25 for illustrations of general family characteristics.
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, fewmany; phyllaries in 23 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 310-ribbed; pappus a crown of short scales
Species in genus: 70 species: Eur, Asia, North America
Etymology: (Latin: immortality)
See also Sphaeromeria.
Perennial, strongly aromatic, ± glabrous to finely hairy; caudex woody
Stems < 1 m, ridged, branched
Leaves 410 cm, 1.54 cm wide, ovate in outline, petioled, 2-pinnate; uppermost generally 1-pinnate, 1° leaflets ovate, generally 35, coarsely rounded or acute
Inflorescence: heads radiate, 1030 in rounded or flat-topped clusters, < 2 cm diam; phyllaries in 23 series, leathery, sparingly hairy, margins transparent
Ray flowers: ligules < 8 mm, white
Disk flowers: corolla 2 mm, yellow
Fruit 2 mm, cylindric, 510-ribbed; pappus a crown, < 0.5 mm or 0
Ecology: Common. Disturbed urban areas, roadsides, fields
Elevation: generally < 250 m.
Bioregional distribution: Klamath Ranges, North Coast Ranges, n Sierra Nevada Foothills, Great Central Valley, San Francisco Bay Area, Outer South Coast Ranges, South Coast
Distribution outside California: native to Europe
Long cultivated in Eur and US as ornamental and for medicine
Synonyms: Chrysanthemum p. (L.) Bernardi
|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).|