| 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. |
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, 1–many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1–many 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)4–5; stamens 4–5, 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):1–28. See glossary p. 25 for illustrations of general family characteristics.
Annual or weak per from taproot, often ill-smelling
Leaves alternate, subentire to pinnately dissected, sometimes clasping
Inflorescence: heads generally many, disciform; involucre cylindric to urn-shaped, phyllaries equal in 1 series (or with few smaller bractlets), green or black-tipped; receptacle flat, naked
Pistillate flowers many; corolla narrowly cylindric, ± light yellow
Disk flowers many, sometimes staminate; corollas ± light yellow; anther bases rounded, tips short-triangular; style tips ± hairy, generally papillate
Fruit cylindric, ribbed; pappus of many fine bristles, white in CA
Species in genus: ± 25 species: Am, Australasia (or 5 species: Am)
Etymology: (Greek: name of a Senecio sp.)
Reference: [Barkley & Cronquist 1978 North America Fl II 10:139–142]
| Introduced |
Plant 6–20 dm, lightly gray-hairy, becoming ± glabrous
Leaves (2)7–15 cm; blade narrowly lanceolate, pinnately lobed, lobes generally sharp-toothed
Inflorescence ± flat-topped; involucre cylindric; phyllaries ± 13, 4–7 mm; receptacle narrow
Fruit generally < 2 mm; pappus persistent
Chromosomes: 2n=60
Ecology: Woods near coast
Elevation: < 500 m.
Bioregional distribution: North Coast, Outer North Coast Ranges, Central Coast, Outer South Coast Ranges
Distribution outside California: Oregon; native to Australasia
Synonyms: E. arguta DC