Jepson Flora Project: Jepson Interchange    

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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.



Guy L. Nesom

Annual to perennial herb (subshrub)
Stems generally erect
Leaves alternate, generally entire
Inflorescence: heads generally radiate, 1–many in loose, panicle-like or flat-topped clusters; involucre hemispheric; phyllaries narrowly lanceolate, in 2–several equal to strongly graded series; receptacle flat to steeply conic, naked, smooth to shallowly pitted
Ray flowers (0) generally 10–many; ligules generally white, pink, or blue (yellow)
Disk flowers many; corollas generally narrowly funnel-shaped, yellow; style tips 0.1–0.8 mm, ± triangular
Fruit 0.5–3 mm, generally ± oblong, compressed to ± cylindric, generally 2-ribbed, generally sparsely hairy; pappus (0) generally of 6–50 longer, inner bristles and shorter outer bristles, narrow scales, or short crown
Species in genus: ± 375 species: wordwide
Etymology: (Greek: early old age)
Reference: [Nesom 1992 Phytologia 72:157–208]


E. foliosus Nutt.

Perennial 20–100 cm, from woody roots and often slender-branched caudex, generally ascending, branched above, sparsely appressed-hairy or becoming glabrous
Leaves cauline, generally well distributed around stem, 10–65 mm, thread-like to widely oblanceolate, evenly sized and spaced
Inflorescence often flat-topped; heads 1–several, 10–16 mm diam; phyllaries strongly graded in 3–5 series, sometimes glandular
Ray flowers 15–60; corollas 5–15 mm, ligules generally blue, weakly coiled
Fruit: pappus bristles 20–34
Ecology: Many habitats
Elevation: < 2900 m.
Bioregional distribution: Klamath Ranges, Outer North Coast Ranges, Sierra Nevada Foothills, s High Sierra Nevada, San Francisco Bay Area, South Coast Ranges, Transverse Ranges, Peninsular Ranges, Desert Mountains
Distribution outside California: Oregon, n Baja California
Varieties confinis and mendocinus intergrade.


var. foliosus

Leaves 2–5 cm, thread-like to widely oblanceolate, glabrous to sparsely strigose
Inflorescence: phyllaries 0.5–0.8 mm wide, inner 3.2–4.5 mm, barely glandular, midvein raised, orange-resinous, margins generally thick (or narrowly scarious)
Ray flowers: corollas 6–11 mm
Chromosomes: 2n=18
Ecology: Open, rocky grassland or chaparral to pine/fir forest
Elevation: < 2900 m.
Bioregional distribution: s Sierra Nevada, Outer South Coast Ranges, Transverse Ranges, Peninsular Ranges, Desert Mountains
Distribution outside California: n Baja California
Synonyms: var. stenophyllus (Nutt.) A. Gray
Horticultural information: DRN, SUN: 1, 2, 7, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24.

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bioregional map for ERIGERON%20foliosus%20var.%20foliosus being generated
N.B. The distribution depicted here differs from that given in The Jepson Manual (1993)

Retrieve Jepson Interchange Index to Plant Names entry for Erigeron foliosus var. foliosus
Retrieve dichotomous key for Erigeron
Overlay Consortium of California Herbaria specimen data by county on this map
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