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 and Susan J. Bainbridge

Species in genus: 1 sp
Etymology: (Greek: eyelash pappus)


B. scaber Hook.

Annual 7–40 cm, slender-branched, scabrous to short-hairy, glandular above
Leaves ± alternate, sessile, generally ascending, < 35 mm, linear; margin generally rolled under
Inflorescence: heads 1 or in leafy cymes, radiate; involucre obconic to hemispheric; phyllaries partly surrounding ray fruit, 3–8 mm, glandular; outer receptacle scales phyllary-like, tips of inner green, hairy
Ray flowers 2–8; ligules 2–8 mm, white, purple-veined below; style branches long, glabrous
Disk flowers 6–25(60); corollas 2–3.5 mm, white; anthers purple, tips acute; style barely branched, bristly
Fruit 2–3.5 mm, ± obconic, black, generally ± white-hairy; pappus (0 or) generally < 26 flattened, plumose bristles
Chromosomes: 2n=16
Ecology: Yellow-pine forest, juniper woodland
Elevation: 1000–3000 m.
Bioregional distribution: Klamath Ranges, Cascade Range, n Sierra Nevada, Modoc Plateau
Distribution outside California: to Washington, Idaho, Nevada
Synonyms: subsp. laevis (A. Gray) D.D. Keck
Horticultural information: TRY.

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