|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
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.
Perennial from woody caudex or rhizome, branched above
Leaves alternate, resinous, often sessile
Inflorescence: heads radiate, fewmany, in ± flat-topped to panicle-like, often ± 1-sided clusters; involucre cylindric to bell-shaped (wider when dry); phyllaries in 35 graduated, overlapping series, midrib generally ± swollen, translucent
Ray flowers fewmany; ligules yellow
Disk flowers fewmany; corollas yellow, generally glabrous; style branches finely papillate, appendage triangular
Fruit obconic, compressed; pappus of 2545 long-barbed bristles in 1 series
Species in genus: ± 150 species: especially North America (South America, Eurasia)
Etymology: (Greek: make-well, from purported medicinal value)
Reference: [Semple et al. 1990 Can J Bot 68:20702082]
Plant generally ± glabrousSee the CNPS Inventory for information about endangerment and rarity.
Stems < 13 dm, from short caudex, often slender
Leaves: lowest largest, 520 cm, (very) narrowly oblanceolate, entire, often ± fleshy, base nearly sheathing; uppermost reduced to linear scales, often with axillary leaf-clusters
Inflorescence narrow; heads fewmany; involucre 2.54 mm; phyllaries very narrowly triangular, inrolled near tip, sharply acute, outer 1/31/2 length inner, midrib generally enlarged, translucent
Ray flowers 810; ligules 12.5 mm
Disk flowers 1020; corollas ± 34 mm
Fruit 11.5 mm, ± strigose
Ecology: Near streams in asbestos-laden soils
Elevation: 600900 m.
Bioregional distribution: s Inner South Coast Ranges (San Benito, Fresno cos.)
Horticultural information: In cultivation.