|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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, 1many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1many 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)45; stamens 45, 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):128. See glossary p. 25 for illustrations of general family characteristics.
Annual to perennial herb, taprooted, branched above, strigose-bristly; hairs minutely knobby
Leaves generally ± cauline, alternate; lower oblanceolate to ovate, base or petiole ± spreading-hairy; upper reduced, glandular
Inflorescence ± flat-topped; heads generally radiate; involucre ± bell-shaped; phyllaries in 35 graded series; receptacle naked, pitted
Ray flowers (0)1030(40); ligules yellow
Disk flowers many; corollas yellow; style branches finely papillate, appendage narrowly triangular
Fruit obconic; ray fruit ± 3-angled, pappus 0 or of bristles; disk fruit compressed, outer pappus of narrow scales < 1 mm, inner of 3045 bristles 37 mm
Species in genus: ± 30 species: especially w North America
Etymology: (Greek: different cases, from ray and disk fruits)
Reference: [Semple 1990 Brittonia 42:221228]
Perennial 113 dm, ± bristly to woolly, ± glandular above
Leaves: lower tapered; upper ± sessile, 15 cm
Inflorescence: involucre 814 mm, generally not subtended by leaf-like bracts, ± hairy and glandular
Ray flowers 330; ligules 310 mm
Disk flowers 2050; corollas 310 mm; lobes generally sparsely hairy
Ecology: Dunes, grassland, oak woodland
Elevation: < 2700 m.
Bioregional distribution: c&s North Coast, n Central Coast, c&s Sierra Nevada Foothills, Tehachapi Mountain Area, San Joaquin Valley, Central Western California, South Coast, Transverse Ranges, Peninsular Ranges
Distribution outside California: Baja California
Highly variable, especially in CW; subspp. ± merge where ranges overlap.
Leaves wavy-margined; upper stiff, ± whitish, hairs generally ± 1 mm
Inflorescence: heads fewmany
Disk flowers 2040
Elevation: < 2700 m.
Bioregional distribution: Transverse Ranges, c Peninsular Ranges, San Jacinto Mountains
Synonyms: Chrysopsis villosa (Pursh) Nutt. var. f. (Greene) H.M. Hall
PR plants (more glandular, less hairy) have been called var. sanjacintensis Semple
Horticultural information: TRY.