Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit 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.


Elizabeth McClintock

Stems erect
Leaves alternate, toothed or pinnately lobed
Inflorescence: heads radiate, peduncled; phyllaries in 2–3 series, overlapping, scarious-margined; receptacle flat to convex or conic, naked
Ray flowers: ligules generally yellow or white
Disk flowers many; corollas yellow; anther tips ovate, bases rounded or ± cordate; style branches truncate with shrub-like tips
Fruit: ray achenes 3-angled, wings present or 0; disk achenes ± cylindric, pappus 0 or a narrow crown
Species in genus: ± 5 species: Medit
Etymology: (Greek: gold flower)
Reference: [Haw 1986 The Garden 111(11):525–528; Humphries 1976 Bull Brit Mus Bot 5:147–240]
See also Argyranthemum, Leucanthemum, Tanacetum.


C. segetum L.


Stems < 80 cm, simple or branched from near base
Leaves: blades of middle and lower leaves 3.5–6 cm, pinnately lobed, lobes generally not reaching midrib; upper leaves < 3.5 cm, oblong to obovate, irregularly toothed or subentire, sessile
Inflorescence: heads < 3 cm diam; phyllaries generally in 3 series, margins widely scarious
Ray flowers ± 20; ligules < 15 mm
Disk flowers many; corollas 3–4 mm
Fruit: ray achenes ± 2 mm, ± compressed, lateral wings 2; disk achenes ± cylindric, 10-ribbed, pappus 0
Chromosomes: 2n=18
Ecology: Common. Escape from cultivated in urban coastal areas, fields
Elevation: < 200 m.
Bioregional distribution: North Coast, Outer North Coast Ranges, n Central Western California, expected more widely
Distribution outside California: native to Europe, sw Asia

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bioregional map for CHRYSANTHEMUM%20segetum 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 Chrysanthemum segetum
Retrieve dichotomous key for Chrysanthemum
Retrieve multiple-entry key (MEKA) for Chrysanthemum
Overlay Consortium of California Herbaria specimen data by county on this map
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