|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
Annual to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1many 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)45; stamens 45, 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):128. See glossary p. 25 for illustrations of general family characteristics.
Annual to shrubs, ± woolly
Leaves generally alternate, entire to nearly compound
Inflorescence: heads 1many, generally radiate; cluster often ± flat-topped; involucre obconic to hemispheric; phyllaries in 1 series, free or ± fused; receptacle flat to columnar, generally naked
Ray flowers generally ± 1 per phyllary; ligules entire to lobed, generally yellow (white)
Disk flowers (3)10300; corolla yellow; anther tips ovate, deltate or awl-shaped
Fruit 4-angled or flattened in outer flowers, generally club-shaped in inner flowers; pappus 015 ± jagged or fringed scales
Species in genus: 14 species: w North America
Etymology: (Greek: woolly leaf)
Reference: [Mooring 1991 Madroño 38:213226]
Annual species by Dale E. Johnson.
Generally ± subshrub 110 dm
Leaf 18 cm, linear to ovate, entire to ± 2-pinnately compound, generally becoming glabrous above
Inflorescence: heads 15+; peduncles 330 cm; involucres 512 mm, bell-shaped to hemispheric; phyllaries 515; receptacle ± flat to ± conic
Ray flowers (0) generally 813; ligules 620 mm, oblong to elliptic
Disk flowers 20300; corollas 2.55 mm, tube generally glandular
Fruit generally variable, 25 mm, glandular or hairy; pappus scales 0 or 612, 02 mm, translucent
Ecology: Many (generally dry) habitats
Elevation: < 4000 m.
Bioregional distribution: Northwestern California, Cascade Range, Sierra Nevada (except s Sierra Nevada Foothills), Sacramento Valley, Central Western California (except Inner South Coast Ranges), Modoc Plateau
Distribution outside California: to British Columbia, Montana, Wyoming, Nevada
Polyploid pillar complex of intergrading races; key is to modal populations; some vars. hybridize with E. confertiflorum.