TREATMENT FROM THE JEPSON MANUAL (1993) |
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©Copyright 1993 by the Regents of the University of California
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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 |
Subshrub 315 dm, much-branched, becoming glabrous
Leaf 37 cm, lanceolate to ovate, entire to ± 12-pinnately compound, becoming glabrous above; margins rolled under
Inflorescence: heads 515+; peduncles < 1 cm; involucres 57 mm, bell-shaped; phyllaries 811, obtuse or acute, keeled, barely overlapping, free; receptacle convex
Ray flowers (0)69; ligules 35 mm
Disk flowers: corollas 4 mm, glandular
Fruit 34 mm, linear-oblong, ± glandular and bristly; pappus often ± 1 mm, unequal, obtuse
Chromosomes: 2n=30
Ecology: Dunes, coastal scrub
Elevation: < 100 m.
Bioregional distribution: North Coast, Central Coast, n Channel Islands
Distribution outside California: s Oregon
Synonyms: var. artemisiifolium (Less.) J.F. Macbr.; var. depressum Greene
Horticultural information: DRN: 5, 17 &IRR: 7, 14, 15, 16, 22, 23, 24 &SHD: 8, 9, 19, 20, 21; GRCVR; also STBL.