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.


Bruce G. Baldwin

Perennial, ± scapose from generally branched rhizome; rosettes often clumped
Leaves simple, sessile, ± basal
Inflorescence glandular, sometimes hairy; heads radiate or discoid, generally solitary; phyllaries generally as many as ray flowers, ± folded around ray ovaries; chaff scales in 1 involucre-like series, ± equal, ciliate-hairy
Ray flowers 0–13; corollas yellow to red; ligules often deeply lobed
Disk flowers 7–84; corollas yellow to red; style branches long, tips bristly
Fruit ± cylindric, ± straight, ascending-hairy, black; pappus of flat, ciliate-plumose bristles
Species in genus: 3 species: montane CA, w NV, OR
Etymology: (Latin: small Raillardia or Railliardia )
Reference: [Baldwin et al. 1991 Proc Natl Acad Sci. USA 88:1840–1843]

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