Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

ASTERACEAE

SUNFLOWER FAMILY

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.

ARGYRANTHEMUM

Elizabeth McClintock

Subshrubs
Stems branched
Leaves alternate, generally variously lobed
Inflorescence: heads radiate, solitary, generally standing above leaves; phyllaries overlapping, in 3–4 series, green, margins scarious; receptacle convex to conic, naked
Ray flowers white, yellow, or pink
Disk flowers many; corollas yellow; anther tips ovate, bases rounded or ± cordate; style branches truncate with shrub-like tips
Fruit: ray achenes 3-angled, 2–3-winged, pappus a crown; disk achenes 4-angled or compressed, wings 1–2 or 0, pappus a crown
Species in genus: 22 species: Canary Islands, Madeira
Reference: [Humphries 1976 Bull Brit Mus Bot 5:147–240]
A. frutescens (Paris daisy) is widely cultivated.

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