|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
For up-to-date information about California vascular plants, visit the Jepson eFlora.
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.
Stems generally many from base
Leaves alternate, generally drought-deciduous, simple, petioled, entire or rarely toothed
Inflorescence: heads radiate or discoid, solitary or in cyme-like panicles; peduncles generally long; involucre hemispheric; phyllaries in 23 series, free; receptacle chaffy, scales folded around fruits and falling with them
Ray flowers sterile; style 0; ligules yellow
Disk flowers many; corollas yellow or brown-purple, tube slender, throat abruptly expanded, lobes triangular; anther tips ovate, ± acute; style tips triangular
Fruit strongly compressed, obovate or wedge-shaped; edges long-ciliate; faces glabrous or short-hairy; pappus of 2 narrow scales or 0
Species in genus: 13 species: w North America, w South America
Etymology: (Christopher Encel, 16th century)
Commonly hybridizing, especially in disturbed areas; E. farinosa X E. frutescens is common; E. farinosa X E. californica, E. farinosa X E. actoni, E. actoni X E. frutescens, E. frutescens X E. virginensis, E. farinosa X Geraea canescens have been reported.
Shrub 515 dm, with many slender branches from base
Stems branched below; young stems hairy; older stems with fissured bark
Leaves scattered along stems; petioles 612 mm; blades 2.54 cm, ovate to deltate, acute, silvery green, canescent
Inflorescence: heads radiate, solitary; peduncles canescent; involucre 814 mm; phyllaries ovate
Ray flowers 1525; ligules 1025 mm
Disk flowers: corollas 56 mm, yellow
Fruit 57 mm; pappus generally 0
Ecology: Open areas, rocky slopes, roadsides
Elevation: 8001500 m.
Bioregional distribution: sw San Joaquin Valley and adjacent Western Transverse Ranges (Cuyama Valley), w Desert and adjacent California Floristic Province, White and Inyo Mountains, Desert Mountains
Distribution outside California: sw Nevada, n Baja California
Flowering time: FebJul
Synonyms: E. virginensis Nelson subsp. a. (Elmer) D.D. Keck
Horticultural information: DRY, SUN, DRN: 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24.
|YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).|