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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 North America
Etymology: (Greek: carved side, from sculptured fruit)


G. marginata D.C. Eaton

Annual, taprooted, forming small tufts; sap milky
Stems many, semi-prostrate, 2–5 cm
Leaves 2–5 cm, lobed; lobes rounded, toothed, margins whitish, hard
Inflorescence: heads ligulate, generally 1 (2–3 in cymes); involucre 10–12 mm, cylindric; phyllaries in 2 series, outer few, linear, inner 7–12, equal, narrow; receptacle naked
Flowers 7–16; ligules cream to pale yellow, readily withering
Fruit 4 mm, oblong, often curved, obtusely 5-angled; ribs alternating with 5 rows of pits, abruptly short-beaked; pappus ± 8 mm, of many white bristles, outer falling separately, inner persistent
Chromosomes: 2n=18
Ecology: Local on sandy flats
Elevation: 600–2100 m.
Bioregional distribution: s High Sierra Nevada, East of Sierra Nevada, Mojave Desert
Distribution outside California: to Oregon, Utah, Arizona
Flowering time: Apr–Jun
Synonyms: G. setulosa A. Gray
Horticultural information: TRY.

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