TREATMENT FROM THE JEPSON MANUAL (1993) |
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©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
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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 |
Annual 115 cm, often tufted, woolly
Leaf 720 mm, spoon-shaped to obovate, entire or 3-lobed
Inflorescence: head 1; peduncles 13 cm; involucre 57 mm, bell-shaped; phyllaries 510, acute, free; receptacle hemispheric
Ray flowers 510; ligules 34 mm, yellow, sometimes cream-white
Disk flowers many; corollas 23 mm, throat minutely puberulent; anther tips awl-like, glabrous
Fruit ± 2 mm, narrowly club-shaped, glabrous or minutely strigose; pappus (0)0.40.8 mm
Chromosomes: 2n=10+
Ecology: Chaparral, sagebrush or desert scrub or woodlands
Elevation: < 2400 m.
Bioregional distribution: e San Francisco Bay Area, San Gabriel Mountains, San Bernardino Mountains, Peninsular Ranges, East of Sierra Nevada, Desert
Distribution outside California: to sw Utah, nw Arizona, n Baja California
Flowering time: MarMay
Synonyms: var. rubellum (A. Gray) A. Gray
Horticultural information: TRY.