|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.
Perennial to shrub
Stems erect, often densely clustered
Leaves alternate, sessile, entire
Inflorescence: heads discoid, arrayed in ± dense cymes, peduncled or subsessile; involucre generally cylindric; phyllaries generally in 35 series (± 5 vertical ranks), free, overlapping, keeled; receptacle naked
Flowers 220 (often 5) per head; corollas generally yellow, lobes 0.53 mm, generally spreading; style branches long, slender, generally exserted
Fruit narrowly cylindric, ± 5-ridged, generally light brown; pappus of many white to brownish bristles
Species in genus: 16 species: sw Can to n Mex
Etymology: (Greek: golden shrub)
Closely related to (perhaps part of) Ericameria.
Shrub < 28 dm, ± tomentose; odor strong
Stems whitish to green, ± flexible, very leafy or naked at flower
Leaves 17 cm, thread-like to narrowly (ob)lanceolate
Inflorescence dense, flat-topped or rounded, panicle-like; involucre 614.5 mm, cylindric; phyllaries ± lanceolate to ovate, in vertical ranks, ± strongly keeled, firm, obtuse to acute
Flowers generally 5; corollas 612 mm; style appendage generally > stigma
Fruit 38 mm, generally hairy; pappus generally = corolla
Ecology: Diverse habitats
Elevation: 503300 m.
Bioregional distribution: Northwestern California, Cascade Range, Sierra Nevada, Central Western California (except Central Coast), Transverse Ranges, Peninsular Ranges, Great Basin Floristic Province, Mojave Desert
Distribution outside California: to British Columbia, Montana, Wyoming, Colorado, New Mexico, Baja California
Highly variable; 22 subspp. in w US.
Plant 615 dm, gray- or yellow-green
Stems ± leafless
Leaves (if any) 13 cm, thread-like, curved
Inflorescence: involucres 78.2 mm, glabrous, sticky; phyllary tips abruptly narrowed, recurved
Flowers: corollas 67 mm
Ecology: Gravelly arroyos
Elevation: 7001700 m.
Bioregional distribution: Mojave Desert.Locally common.