Jepson Flora Project: Jepson Interchange    

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


Annual, perennial herb
Stems erect
Leaves simple; lower opposite; upper sometimes alternate, sessile
Inflorescence: heads radiate, borne in a terminal, leafy-bracted cyme; peduncles slender; involucre bell-shaped; phyllaries few, outer ± leaf-like in texture, inner membranous; receptacle conic, chaffy; chaff scales flat
Ray flowers few; corollas yellow; ligules wide, conspicuously 3-lobed
Disk flowers many; corollas yellow; style tips tapering
Fruit 4-angled, ± flattened, glabrous, shining; pappus 0
Species in genus: 6 species: Africa
Etymology: (Pierre Guizot, 1787–1874; French politician, historian)


G. abyssinica (L.f.) Cass.


Stems 3–15 dm
Leaves 7–16 cm, linear to lance-ovate, clasping; tip acute to obtuse; margin serrate; surfaces sparsely puberulent to scabrous
Inflorescence: peduncles 3–5 cm; involucre 1–1.5 cm diam; outer phyllaries 5, ± 1 cm, ovate or obovate, obtuse
Ray flowers 8–13; ligule 1.5–2 cm
Disk flowers: corollas 4–5 mm
Fruit ± 4 mm, brown or black
Chromosomes: 2n=30
Ecology: Waste places
Elevation: < 200 m.
Bioregional distribution: San Francisco Bay Area, South Coast
Distribution outside California: native to Africa
Cult as ornamental, oil crop, and birdseed.

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bioregional map for GUIZOTIA%20abyssinica being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Guizotia abyssinica
Retrieve dichotomous key for Guizotia
Overlay Consortium of California Herbaria specimen data by county on this map
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