|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.
Perennial or subshrub, 36 dm, glabrous or densely short-tomentose
Stems: branches many, ± stout, rigid
Leaves: cauline often reduced to scales
Inflorescence: heads at tips of side branches; peduncles 113 mm (or 0 above); involucre 810 mm; outer phyllaries << inner, appressed or spreading; inner phyllaries 5
Flowers 35; ligules lavender-pink
Fruit 34 mm; pappus plumose but not to base, pale brownish
Ecology: Dry flats, deserts
Elevation: < 2400 m.
Bioregional distribution: s High Sierra Nevada, Tehachapi Mountain Area, San Joaquin Valley, Inner South Coast Ranges, Transverse Ranges, East of Sierra Nevada, Desert
Distribution outside California: to Utah, Texas, nw Mexico; also in Kansas
Herbage densely short-tomentose
Ecology: Gravelly soil
Elevation: < 1000 m.
Bioregional distribution: Mojave Desert
Distribution outside California: w Nevada
Horticultural information: TRY.