|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
previous taxon |
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 or perennial herb, generally densely glandular, aromatic
Stems 1several, generally simple below, ± branched above
Leaves generally opposite below, alternate above, generally linear to lanceolate, entire to slightly toothed
Inflorescence: heads generally radiate, generally peduncled, fewmany; phyllaries generally 120, free, enclosing (and falling with) ray achenes; receptacle ± flat, generally glabrous; chaff scales generally ± fused, in ring between ray and disk flowers
Ray flowers generally 120, sometimes minute; ligules 23-lobed, generally yellow
Disk flowers 1many, sometimes staminate; corollas yellow or maroon; anther tips triangular-ovate; style tips linear to oblong, acute, bristly
Fruit club-shaped or obovoid; ray achenes compressed, thickened, or 3-angled (1 angle toward center of head), ridged, sometimes beaked; pappus 0 or of short scales; disk achenes ± symmetric; pappus 0 or of 410 scales or bristles
Species in genus: 21 species: w North America, sw South America
Recent taxonomic note: *See revised taxonomy of Baldwin 1999 Novon 9:462471.
Etymology: (Chilean name)
Reference: [Nelson & Nelson 1980 Brittonia 32:323325]
Annual 1.58(12) dm, strongly ill-scented
Stems simple below or with stiff ascending branches, very leafy, soft-hairy to ± bristly, especially below, stalked-glandular above; glands yellow
Leaves 210 cm, mostly cauline, often with axillary clusters, generally ascending, loosely strigose, often bristly-ciliate; upper glandular
Inflorescence: heads discoid or inconspicuously radiate, ± sessile to short-peduncled, in dense cymes or panicle-like clusters; involucre (including chaff) 5.59 mm, narrowly ovoid or ellipsoid, sometimes curved; phyllaries 03, soft-hairy or ± bristly, ± glandular, tips flat; chaff scales 1few, free, ± like phyllaries
Ray flowers 03; corolla tubes 13.5 mm, ligules 1.53 mm, greenish yellow or purple-tinged
Disk flowers 15(12), fertile; corollas 34.5 mm; anthers black
Fruits alike, 46 mm, oblanceolate, compressed side-to-side, glabrous, black; beak 0; pappus 0
Ecology: Forest openings
Elevation: 10502700 m.
Bioregional distribution: s Klamath Ranges (Trinity Alps), Cascade Range, n&c High Sierra Nevada, San Bernardino Mountains, Great Basin Floristic Province
Distribution outside California: to Alaska, South Dakota, Colorado, New Mexico
Flowering time: JulSep
Naturalized in NCo, n SCoR.
|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).|