|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
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 to minutely glandular; peduncles 510 mm; outer phyllaries reflexed
Fruit 56.8 mm; pappus bristles plumose on upper 5075%
Ecology: Dry, open places
Elevation: 3001200 m.
Bioregional distribution: c&s Sierra Nevada Foothills.