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

RUDBECKIA

CONE-FLOWER

Annual, biennial, perennial herb
Stems erect, simple or branched
Leaves simple, basal and alternate, petioled or upper sessile; blades entire, toothed or pinnately lobed
Inflorescence: heads radiate or discoid, 1–few, terminal; peduncles long, stout; involucre disk-shaped; phyllaries in 1–3 equal or unequal series, spreading or reflexed; receptacle conic to columnar, chaffy; chaff scales oblong, entire folded around fruits
Ray flowers 0 or many, sterile
Disk flowers many; corolla yellow to dark brown, diam of tube and throat ± equal; style tips blunt-triangular
Fruit oblong, 4-angled, ± flattened; pappus a crown of fused scales or 0
Species in genus: ± 15 species: North America
Etymology: (O.J. Rudbeck, 1630–1702, and O.O. Rudbeck, 1660–1740, professors of botany at Uppsala, Sweden)

Native

R. occidentalis Nutt. var. occidentalis

WESTERN CONE-FLOWER

Perennial; rhizome stout
Stems 6–20 dm, simple or few-branched above
Leaves: blade generally 10–30 cm, elliptic to widely ovate, coarsely serrate to nearly entire, glabrous or short-hairy on 1 or both surfaces
Inflorescence: heads discoid, 1–few; peduncle 15–45 cm; phyllaries 1–1.5 cm; disk ovoid, 2–6 cm; chaff dark purple
Ray flowers 0
Disk flowers: corollas 3–4 mm, dark purple
Fruit 3–5 mm; pappus 0 or scales 0.5–1 mm
Chromosomes: 2n=38
Ecology: Meadows, seeps
Elevation: 1200–1850 m.
Bioregional distribution: Klamath Ranges, n High Sierra Nevada
Distribution outside California: to Washington, Wyoming, Colorado

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bioregional map for RUDBECKIA%20occidentalis%20var.%20occidentalis being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Rudbeckia occidentalis var. occidentalis
Retrieve dichotomous key for Rudbeckia
Retrieve multiple-entry key (MEKA) for Rudbeckia
Overlay Consortium of California Herbaria specimen data by county on this map
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