|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
previous taxon |
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.
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 to shrubs, glabrous or hairy; sap milky
Stems branched, 0.53 m
Leaves cauline or some basal, alternate
Inflorescence: heads ligulate; involucre cylindric; phyllaries in 2several series; receptacle naked
Flowers fewmany; ligules lavender, pink, or whitish, readily withering
Fruit linear, club-shaped, or oblong; pappus generally of 930 stiff, plumose bristles
Species in genus: 24 species: w North America
Etymology: (Greek: wreath division)
Reference: [Gottlieb 1972 Madroño 21:463481]
Annual, tap-rooted, rosette-forming species highly variable and complexly interrelated.
Annual 26 dm, glabrous to minutely glandular
Leaves: basal rosette generally withered at flower; cauline small, linear, often 0 at flower
Inflorescence various; involucre 67 mm; outer phyllaries << inner, reflexed or erect and appressed; inner phyllaries 46
Flowers 56; ligules 68 mm, white to pink
Fruit 26.8 mm, 5-angled; pappus bristles variously plumose, white
Ecology: Common. Desert scrub, dry disturbed ground
Elevation: < 2000 m.
Bioregional distribution: Klamath Ranges, Sierra Nevada (except n Sierra Nevada Foothills), San Joaquin Valley, Central Coast, South Coast Ranges, Southwestern California, Great Basin Floristic Province, Desert
Distribution outside California: to Washington, Idaho, Colorado, Texas, Baja California
Inflorescence glabrous or sparsely glandular; peduncles 1040 mm; outer phyllaries erect, appressed
Fruit 2.53.5 mm; pappus bristles plumose on upper 4555%
Ecology: Deserts, dry slopes
Elevation: 1002000 m.
Bioregional distribution: Great Basin Floristic Province, Desert
Distribution outside California: to Colorado, Texas, Baja California
Flowering time: MaySep
Synonyms: var. pentachaeta (D.C. Eaton) H.M. Hall
|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).|