TREATMENT FROM THE JEPSON MANUAL (1993) |
previous taxon |
next taxon
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. |
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.
Native |
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.