|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.
Subshrub 25 dm, becoming ± glabrousSee the CNPS Inventory for information about endangerment and rarity.
Leaf 26 cm, diamond-shaped to ± obovate, thin, deeply triangular-lobed, glabrous above
Inflorescence: heads 110; peduncles 18 cm; involucres 47 mm, widely bell-shaped; phyllaries 610, acute, barely overlapping, free; receptacle flat (except conic in center)
Ray flowers 613; ligules generally 610 mm
Disk flowers 4070; corollas 34 mm, glandular
Fruit 34 mm; angles generally strigose; pappus 0.31 mm, disk scales > ray scales
Ecology: Generally oak woodland
Elevation: 100150 m.
Bioregional distribution: cw San Francisco Bay Area (San Mateo Co.).Probable derivative of E. lanatum var. arachnoideum X E. confertiflorum. Threatened by development
Horticultural information: In cultivation.