Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



David J. Keil, Family Editor and author, except as specified

Annual to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1–many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1–many 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)4–5; stamens 4–5, 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):1–28. See glossary p. 25 for illustrations of general family characteristics.



G. Ledyard Stebbins

Perennial, white-woolly, dioecious (or pistillate heads with few staminate flowers), rhizomed
Stem generally erect (cespitose), leafy
Leaves basal, alternate, linear to lanceolate, entire, not reduced upward
Inflorescence: heads discoid or disciform, small, many in terminal panicles, staminate and pistillate heads similar; involucre hemispheric; phyllaries many, free, overlapping in several unequal series; receptacles naked
Disk flowers functionally staminate; corolla narrowly tubular, yellowish; anther bases tailed, tips ± ovate; style branches wider at tip, truncate, ovary vestigial, pappus of fine bristles
Pistillate flowers: corolla slender, ± yellow, lobes minute
Fruit cylindric or obconic; pappus of many fine, minutely barbed bristles
Species in genus: 60–100 species: North America, Asia
Etymology: (Greek: name of some everlasting)

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