|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
Stems generally erect
Leaves opposite or alternate, generally reduced upward, often 3-veined from near base, generally rough-hairy
Inflorescence: heads radiate, solitary or in cymes; involucre bell-shaped to hemispheric; phyllaries in 13 generally ± equal series, free; receptacle flat to rounded; chaff scales 03-lobed
Ray flowers 10many, sterile; ligules yellow
Disk flowers many; corollas yellow to red or purple, tube short, throat base often swollen, lobes triangular; style appendages triangular
Fruit oblanceolate to obovate, ± compressed; sides rounded; pappus generally of 2 deciduous, lanceolate to ovate scales (sometimes also 1several shorter scales)
Species in genus: 67 species: Am
Etymology: (Greek: sun flower)
Reference: [Heiser 1969 Mem Torrey Bot Club 22(3):1218]
Perennial 540 dm, from clustered, tuber-like roots; rhizome short
Stems glabrous or hairy
Leaves alternate or opposite, subsessile; blade 1020 cm, narrowly lanceolate to ovate, acute to acuminate, entire or serrate, glabrous to hairy
Inflorescence: heads fewmany; peduncles 118 cm; involucre 12 cm diam; phyllaries ± erect, 816 mm, generally < 3 mm wide, ± linear, = or slightly > disk, glabrous or tomentose; chaff scales 812 mm, entire or 3-toothed, acute, short-rough-hairy
Ray flowers 1220; ligules 1525 mm
Disk flowers: corollas 56 mm, lobes yellow
Fruit 34 mm; pappus scales 34 mm (sometimes also with shorter scales)
Ecology: Damp meadows, marshes
Elevation: < 500 (c-w SW) or 12002500 m.
Bioregional distribution: c-w Southwestern California, San Gabriel Mountains, San Bernardino Mountains, Great Basin Floristic Province
Distribution outside California: to British Columbia, e Canada, New Mexico
See the CNPS Inventory for information about endangerment and rarity.
Stems glabrous to tomentose
Leaves: blade rough-hairy to densely tomentose above, ± finely tomentose below
Inflorescence: peduncles and phyllaries tomentose
Extinction status: PRESUMED EXTINCT
Elevation: < 500 m.
Bioregional distribution: c-w Southwestern California.Last seen in 1937.