|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.
Perennial generally from long, naked rhizome
Leaves: basal 0 or generally withered by flower; cauline opposite
Inflorescence ± flat-topped; heads radiate or discoid, 1many; involucre hemispheric to obconic; phyllaries generally in 2 ± equal series; receptacle ± flat, naked
Ray flowers (0)621; ligules (orange-)yellow
Disk flowers many; corolla generally soft-hairy, colored like ligules; anther bases entire or slightly sagittate, tips triangular; style branches flat, tips truncate, very short, hair-tufted
Fruit ± cylindric, 510-veined; pappus of many barbed to subplumose bristles, white to red-brown
Species in genus: ± 27 species: North America, Eurasia
Etymology: (Latin or Greek: ancient name)
Reference: [Downie & Denford 1988 Rhodora 90:245275]
Diploid species sexual; polyploid species generally form seeds asexually.
Plant 13 dm, glandular, short- (or long-)hairy; rhizome tip scaly
Stems 1several, loose, generally unbranched
Leaves: basal sometimes in sterile rosettes; cauline 23 pairs, short-petioled, lower largest, blade 38 cm, elliptic to widely ovate, (sub)entire, base rounded to subcordate
Inflorescence: heads radiate, 13; involucre 1018 mm, ± obconic; phyllaries acute to acuminate, stalked-glandular, base often ± long-hairy
Ray flowers 611(15); ligules generally 12 cm
Disk flowers: corolla glandular
Fruit 78.5 mm, glandular or short-forked-hairy; pappus short-barbed to subplumose, white to straw-colored
Ecology: Coniferous forest, meadows
Elevation: 20003000 m.
Bioregional distribution: Klamath Ranges, High Cascade Range, n&c High Sierra Nevada
Distribution outside California: to Washington, Nevada
Sexual or not. Alpine forms intergrade with A. cordifolia.
|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).|