Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.

ASTERACEAE

SUNFLOWER FAMILY

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.

ERIGERON

FLEABANE DAISY

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]

Native

E. breweri A. Gray

Perennial 7–75 cm, from woody roots and slender-branched caudex, generally not wiry or brittle, generally densely short-spreading-hairy; glands generally 0
Leaves cauline, 5–40 mm, linear to oblanceolate, evenly sized and spaced
Inflorescence: heads generally radiate, 8–15 mm diam; phyllaries strongly graded in 3–5 series, glandular or not, tip generally ± like body
Ray flowers 12–45, 4–7 mm, ligules white to pink or drying blue, weakly coiled
Fruit: pappus bristles 22–46
Ecology: Many habitats
Elevation: 300–3100 m.
Bioregional distribution: Klamath Ranges, n&s High Sierra Nevada, San Gabriel Mountains, San Bernardino Mountains, San Jacinto Mountains, East of Sierra Nevada, Mojave Desert
Distribution outside California: Oregon, w Nevada

Native

var. porphyreticus (M.E. Jones) Cronquist


Stem 20–30 cm, wiry, brittle
Leaf 5–30 mm; hairs 0.1–0.2 mm
Inflorescence: phyllaries thick-margined, hairs glandular and not, long, thick-based, stiffly spreading, translucent
Chromosomes: 2n=18
Ecology: Open, rocky sagebrush to yellow-pine forest
Elevation: 1200–2600 m.
Bioregional distribution: San Bernardino Mountains, East of Sierra Nevada, Mojave Desert
Distribution outside California: sw Nevada
Flowering time: May–Aug(Sep)
Some plants in SnBr have hairs like var. breweri.

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bioregional map for ERIGERON%20breweri%20var.%20porphyreticus being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Erigeron breweri var. porphyreticus
Retrieve dichotomous key for Erigeron
Overlay Consortium of California Herbaria specimen data by county on this map
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