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 < 10 dm, ± lightly puberulent
Leaves crowded, 412 mm, subcylindric, grooved on back, ± obtuse, generally with fan-shaped axillary clusters
Inflorescence: heads radiate, many in panicle-like clusters; involucre 57 mm, 56 mm diam, obconic; phyllaries 1622 in 34 series, outer lanceolate, acuminate, inner narrowly oblong, acute, tomentose-ciliate, midrib a thread-like gland
Ray flowers 26; corollas 45.5 mm
Disk flowers 814; corollas 67 mm
Fruit < or = 3 mm, cylindric, 810-ribbed, striate, glabrous to ± silvery hairy; pappus = corolla, white to tan
Chromosomes: 2n=18
Ecology: Dunes, inland sandy soils
Elevation: < 500 m.
Bioregional distribution: s North Coast, Central Coast, Outer South Coast Ranges, c South Coast
Synonyms: Haplopappus e. (Less.) Hook. & Arn. including subsp. blakei C. Wolf
Perhaps 1 variable sp. with E. palmeri, E. pinifolia.Hybridizes with Chrysothamnus nauseosus.
Horticultural information: DRN, SUN: 17 &IRR: 14, 15, 16, 22, 23, 24.