|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
For up-to-date information about California vascular plants, visit the Jepson eFlora.
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, decumbent to erect, ± bristly-strigose, sometimes densely glandular above
Leaves ± (ob)lanceolate, generally flat; hairs generally < 1 mm; lower tapered to base; upper tapered to subclasping
Inflorescence: heads 1many
Ray flowers 730; ligules 412 mm
Disk flowers 3080; corollas 48 mm, lobes (sub)glabrous (any hairs < 0.2 mm), glands few
Fruit 24 mm
Ecology: Crevices, open sand and gravel, lava flows
Elevation: 4003100 m.
Bioregional distribution: Klamath Ranges, Cascade Range, n&c High Sierra Nevada, s Sierra Nevada Foothills, Modoc Plateau, sw Desert Mountains
Distribution outside California: w N.America, to e Canada, c US
Highly variable; local forms often ± distinct.
|YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).|