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.

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.

OSTEOSPERMUM

Elizabeth McClintock

Annual to shrubs
Leaves generally alternate, entire to pinnately lobed
Inflorescence: heads radiate, generally solitary, long-peduncled; involucre hemispheric; phyllaries in 1–3 series, margins narrowly scarious; receptacle flat or convex, naked
Ray flowers < 20, yellow or white to violet; ligule 3-toothed
Disk flowers many, staminate, blue; anther tip ovate or triangular-ovate, base sagittate, short-tailed; style branches short, not separating
Fruit < 10 mm, round or angled, smooth or tubercled; pappus 0
Species in genus: ± 70 species: especially s Africa
Etymology: (Greek: bone seed, for hard achenes)
Reference: [Norlindh 1943 Studies Calenduleae]

Introduced

O. ecklonis (DC.) Norlindh

AFRICAN DAISY

Subshrub
Stems branched from base, decumbent or ascending, sometimes > 1 m
Leaves alternate, narrowed to a petiole, < 10 cm, oblong to oblanceolate, coarsely serrate, glandular-hairy
Inflorescence: heads 1–few, 5–8 cm, closing at night
Ray flowers ± 15; ligule < 4 cm, white above, blue-purple beneath, or blue-purple throughout
Disk flowers blue-purple
Fruit ± 7 mm, narrowly triangular-ovoid, lightly net-sculptured
Chromosomes: 2n=20
Ecology: Uncommon. Escape from cultivated in disturbed, urban, coastal areas
Elevation: < 200 m.
Bioregional distribution: Outer South Coast Ranges, Western Transverse Ranges, expected more widely
Distribution outside California: native to s Africa
Synonyms: Dimorphotheca e. DC

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bioregional map for OSTEOSPERMUM%20ecklonis being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Osteospermum ecklonis
Retrieve dichotomous key for Osteospermum
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