| TREATMENT FROM THE JEPSON MANUAL (1993) |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
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, 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.
Annual to shrubs, glabrous or hairy; sap milky
Stems branched, 0.5–3 m
Leaves cauline or some basal, alternate
Inflorescence: heads ligulate; involucre cylindric; phyllaries in 2–several series; receptacle naked
Flowers few–many; ligules lavender, pink, or whitish, readily withering
Fruit linear, club-shaped, or oblong; pappus generally of 9–30 stiff, plumose bristles
Species in genus: 24 species: w North America
Etymology: (Greek: wreath division)
Reference: [Gottlieb 1972 Madroño 21:463–481]
Annual, tap-rooted, rosette-forming species highly variable and complexly interrelated.
| Native |
Annual 2–6 dm, glabrous to minutely glandular
Stems much-branched
Leaves: basal rosette generally withered at flower; cauline small, linear, often 0 at flower
Inflorescence various; involucre 6–7 mm; outer phyllaries << inner, reflexed or erect and appressed; inner phyllaries 4–6
Flowers 5–6; ligules 6–8 mm, white to pink
Fruit 2–6.8 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
Highly variable.
| Native |
Inflorescence glabrous to minutely glandular; peduncles 5–10 mm; outer phyllaries reflexed
Fruit 5–6.8 mm; pappus bristles plumose on upper 50–75%
Chromosomes: 2n=16
Ecology: Dry, open places
Elevation: 300–1200 m.
Bioregional distribution: c&s Sierra Nevada Foothills.