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©Copyright 1993 by the Regents of the University of California

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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.

LEONTODON

HAWKBIT

G. Ledyard Stebbins

Annual to perennial herb; sap milky
Stems 1–many from base, simple or few-branched
Leaves all basal
Inflorescence: heads ligulate, 1–few per scape; phyllaries in 1–several series; receptacle naked
Flowers many; ligules yellow, readily withering
Fruit ± cylindric, narrowed at summit or beaked; pappus of narrow scales and or stiff, plumose bristles
Species in genus: ± 45 species: Old World
Etymology: (Greek: lion tooth)

Introduced

L. taraxacoides (Vill.) Mérat


Stems many, 1–3 dm, unbranched
Inflorescence: heads solitary; involucre 7–9 mm; principal phyllaries subequal, ± basal bractlets
Fruit: outer achenes smooth, pappus a crown of short scales; inner achenes roughened, pappus of short and long bristles with expanded bases
Chromosomes: 2n=8
Ecology: Uncommon. Weed in disturbed ground
Elevation: < 1000 m.
Bioregional distribution: Northwestern California, n Sierra Nevada, San Joaquin Valley, Central Coast, San Francisco Bay Area
Distribution outside California: native to Europe
Synonyms: L. leysseri (Wallr.) G. Beck

Introduced

subsp. taraxacoides

Perennial (rarely biennial)
Fruit: beak of inner achenes ± 1 mm
Ecology: Habitats of sp.
Bioregional distribution: North Coast
Distribution outside California: native to Europe

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bioregional map for LEONTODON%20taraxacoides%20subsp.%20taraxacoides being generated
 


Retrieve Jepson Interchange Index to Plant Names entry for Leontodon taraxacoides subsp. taraxacoides
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