|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 perennial herb
Stems 0 to erect, < 30 cm
Leaves alternate, entire, petioled
Inflorescence: head, radiate generally solitary; involucre conic to hemispheric; phyllaries in 26 series, outer generally < inner, free, margins scarious to ciliate; receptacle flat, naked
Ray flowers many; ligules white, pink, blue, or yellow
Disk flowers many; corollas ± yellow; style branches flat, tip hairy
Fruit ± compressed, brown, glabrous to hairy; pappus of minutely barbed, generally flat bristles (ray fruits sometimes also with small outer series)
Species in genus: 21 species: w North America
Etymology: (D. Townsend, amateur US botanist, 17871858)
Reference: [Reveal 1970 GB Naturalist 30:2352]
Some species reproduce by asexual seed.
Biennial or perennial herb < 5 cm; caudex taprootedSee the CNPS Inventory for information about endangerment and rarity.
Leaves basal, generally 11.5 cm, ± narrowly obovate, rounded, entire, long-soft-woolly
Inflorescence: phyllaries ± subequal, lanceolate, ± acuminate, scarious-margined, ± long-hairy
Ray flowers: ligules white to pink or violet
Fruit short-hairy; pappus readily deciduous
Ecology: Gravel slopes
Elevation: 32003500 m.
Bioregional distribution: n East of Sierra Nevada (Mono Co.)
Distribution outside California: to sw Canada, Wyoming, Colorado
Flowering time: MayJun