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

Species in genus: 1 sp.: w US
Etymology: (Greek: fused bristles)
Reference: [Tomb 1972 Madroño 21:459–462]


C. wheeleri A. Gray

Perennial from branched caudex; sap milky; herbage glabrous
Stems 1–4 dm, much-branched
Leaves all cauline, alternate, 1–5 cm, linear to narrowly lanceolate (or scale-like), acute, entire
Inflorescence: heads ligulate, solitary on branchlets 2–5(7) cm; involucre 11–15 mm, narrowly cylindric; phyllaries in 2 series, outer 7–10 short, wide, inner 5 long, linear-oblong; receptacle naked
Flowers 5 per head; ligules 6–12 mm, pale lavender-white, readily withering
Fruit 8–12 mm, columnar, 4–5-ridged, glabrous; pappus double, of 5 stiff awns and generally many bristles, all fused at base, yellowish or tan
Chromosomes: 2n=18
Ecology: Sand dunes, desert scrub
Elevation: 900–1900 m.
Bioregional distribution: White and Inyo Mountains, n Mojave Desert (Eureka Valley)
Distribution outside California: se Oregon, w Nevada
Flowering time: May–Sep
Horticultural information: TRY.
See the CNPS Inventory for information about endangerment and rarity.
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