TREATMENT FROM THE JEPSON MANUAL (1993) |
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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. |
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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.
Shrubs < 50 dm, resinous, generally gland-dotted
Leaves < 10 cm, thread-like to wedge-shaped, entire
Inflorescence various; heads radiate or discoid; involucre 314 mm, obconic to hemispheric; phyllaries in 26 series, ± lanceolate to ovate, generally resinous, tips erect to recurved, obtuse to acuminate or tailed, midrib often thickened with a resin gland
Ray flowers 030; corollas 212 mm, generally yellow
Disk flowers 470+; corollas 311 mm, yellow
Fruit 28 mm, ribbed; pappus white to brown
Species in genus: ± 27 species: w North America
Reference: [Nesom 1990 Phytologia 68:144155]
Generally flowers summer/autumn. Some species hybridize with Chrysothamnus nauseosus.
Native |
Plant 415 dm, glabrous to ± puberulent
Leaf 1055 mm, linear, acute; base narrowed
Inflorescence: head radiate, 1, on ± leafless peduncles; involucre 814 mm, 1018 mm diam, hemispheric; phyllaries in 23 series, linear to lanceolate, acuminate, stalked-glandular, center green, margin cut-ciliate, scabrous
Ray flowers 1318; corollas 920 mm
Disk flowers many; corollas 610 mm
Fruit 45 mm, compressed, 68-veined, densely silky-hairy; pappus 5.57 mm, white
Chromosomes: 2n=18
Ecology: Dry slopes, valleys
Elevation: < 2000 m.
Bioregional distribution: s Sierra Nevada Foothills, Sacramento Valley (Sutter Buttes), s San Joaquin Valley, e Central Western California, Western Transverse Ranges, Mojave Desert, w Sonoran Desert
Distribution outside California: Nevada, sw Utah, w Arizona
Flowering time: MarMay
Synonyms: Haplopappus l. DC
Hybridizes with E. cooperi.
Horticultural information: DRN, DRY, SUN: 2, 3, 7, 9, 10, 11, 12, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24; DFCLT.