|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 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 19 dmSee the CNPS Inventory for information about endangerment and rarity.
Stems simple below to branched throughout; branches ascending, glandular; glands yellow to brown
Leaves 210 cm; upper often widest, sometimes ± clasping, entire or ± serrate, fine-glandular, often ± short-bristly
Inflorescence: heads in open, cyme-like clusters; involucre 4.56.5 mm, depressed-hemispheric; phyllaries soft-hairy or ± bristly, acuminate, glandular, tips flat; chaff scales free, falling from head in fruit
Ray flowers 816; corolla tubes 13 mm, ligules 619 mm, golden yellow
Disk flowers 2065, fertile; corollas 3.55.5 mm; anthers yellow to black
Fruit: ray achenes 3.34.2 mm, plump or ± compressed side-to-side, strongly curved, glabrous, black, beaked, pappus 0; disk achenes 3.24.4 mm, pappus 0
Ecology: UNCOMMON. Grassy slopes
Elevation: < 900 m.
Bioregional distribution: w San Joaquin Valley, e San Francisco Bay Area, Inner South Coast Ranges
Horticultural information: TRY.