|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 or shrub, generally resinous
Stems < 2.5 m, leafy
Leaves generally sessile or short-petioled
Inflorescence: heads radiate or discoid; involucres obconic to bell-shaped; phyllaries in several overlapping series, linear to oblanceolate, generally recurved
Ray flowers 025; corollas < 9 mm, yellow
Disk flowers 460; corollas 410 mm, gradually flared from middle
Fruit 110 mm, 45-angled; pappus of 2060 bristles, 2.512 mm, white to reddish brown
Species in genus: 13 species: w North America
Etymology: (Barclay Hazard, 19th Century CA botanist)
Reference: [Clark 1979 Madroño 26:105127]
Shrub 510 dm, glabrous, ± resinousSee the CNPS Inventory for information about endangerment and rarity.
Leaves 25 cm, (ob)lanceolate to narrowly obovate, generally abruptly pointed, ± entire
Inflorescence: heads radiate; involucre 46 mm wide, obconic; phyllaries 3040, 46 mm, linear, acute to obtuse, recurved, resinous
Ray flowers 812; ligules 23 mm (> disk flowers), tube 34 mm
Disk flowers 1020; corollas 57 mm
Fruit 34.5 mm, faintly ribbed, sparsely strigose; pappus 45 mm, brownish
Ecology: Chaparral, coastal scrub
Elevation: < 200 m.
Bioregional distribution: s South Coast (San Diego Co.)
Distribution outside California: nw Baja California
Threatened by development.