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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



David J. Keil, Family Editor and author, except as specified

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.



Theodore M. Barkley

Annual to tree-like, generally ± loosely hairy, becoming ± subglabrous; roots generally fibrous, branched
Stems generally 1–few per rosette
Leaves alternate; lower generally petioled; middle generally weakly clasping; uppermost generally bract-like
Inflorescence often ± flat-topped; heads radiate or discoid, 1–many; involucre cylindric to hemispheric; main phyllaries in 1 equal series (often subtended by few, much-reduced outer phyllaries)
Ray flowers 0–13; ligules generally yellow to orange
Disk flowers generally < 40; corolla generally ± yellow; style tips truncate to obtuse, generally hair-tufted
Fruit cylindric; ribs shallow, often stiff-hairy; pappus of thin, minutely barbed deciduous bristles ± = fruit body
Species in genus: ± 1500 species: worldwide; some cultivated, some of unusual form
Recent taxonomic note: *For revised taxonomy of Senecio, see Barkley 1999 Sida 18(3):661–672.
Etymology: (Latin: old man, from white pappus)
Reference: [Barkley 1978 North America Flora II 10:50–139]
Among largest genera of flowering plants.


S. eurycephalus A. Gray

Perennial 2–7 dm, from creeping caudex, tomentose, becoming subglabrous
Leaves: basal sometimes fallen by flower, blades 5–10+ cm, < or = petiole, ± ovate, dentate-lobed to dissected; cauline often more lobed
Inflorescence: heads radiate, 5–20; main phyllaries ± 13, sometimes 21, 8–12 mm, tips green or yellow; outer phyllaries inconspicuous
Ray flowers 8(13); ligules 10–15 mm
Disk flowers < 40
Fruit glabrous
Chromosomes: 2n=46
Ecology: Drying, disturbed sites, especially on serpentine
Elevation: 300–1700 m.
Bioregional distribution: e Northwestern California, Cascade Range, n High Sierra Nevada, Modoc Plateau
Distribution outside California: s Oregon


var. eurycephalus

Plant erect, becoming subglabrous
Leaves: lower unevenly dissected, lobes toothed
Chromosomes: 2n=46
Ecology: Woods, rocky streambeds, hillsides
Elevation: 300–1700 m.
Bioregional distribution: e Northwestern California, Cascade Range, Modoc Plateau
Recent taxonomic note: *Packera eurycephala (Torr. & A. Gray) W.A. Weber & Á. Löve var. eurycephala
Horticultural information: SUN, DRN: 1, 6, 7, 14, 15, 16, 17, 18.

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bioregional map for SENECIO%20eurycephalus%20var.%20eurycephalus being generated

Retrieve Jepson Interchange Index to Plant Names entry for Senecio eurycephalus var. eurycephalus
Retrieve dichotomous key for Senecio
Retrieve multiple-entry key (MEKA) for Senecio
Overlay Consortium of California Herbaria specimen data by county on this map
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