TREATMENT FROM THE JEPSON MANUAL (1993) |
previous taxon |
next 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. |
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.
Shrubs < 50 dm, resinous, generally gland-dotted
Leaves < 10 cm, thread-like to wedge-shaped, entire
Inflorescence various; heads radiate or discoid; involucre 314 mm, obconic to hemispheric; phyllaries in 26 series, ± lanceolate to ovate, generally resinous, tips erect to recurved, obtuse to acuminate or tailed, midrib often thickened with a resin gland
Ray flowers 030; corollas 212 mm, generally yellow
Disk flowers 470+; corollas 311 mm, yellow
Fruit 28 mm, ribbed; pappus white to brown
Species in genus: ± 27 species: w North America
Reference: [Nesom 1990 Phytologia 68:144155]
Generally flowers summer/autumn. Some species hybridize with Chrysothamnus nauseosus.
Native |
Plant < 5 dm, densely leafy, glabrous to sparsely puberulent
Leaf 1020 mm, subcylindric, reflexed with age, ± obtuse
Inflorescence: heads generally radiate, 1few in cymes; involucre 67 mm, 68 mm diam, obconic; phyllaries 2226 in 45 series, scarious, pale yellow, resinous, outer lanceolate or ovate, subacuminate, inner oblong, acute
Ray flowers (0)12; corollas 56.5 mm
Disk flowers 2025; corollas 810 mm
Fruit < 3.5 mm, subcylindric, densely long-silky-hairy; pappus > corolla, dull white to reddish brown
Chromosomes: 2n=18
Ecology: Dunes, coastal chaparral, closed-cone-pine forest
Elevation: < 100 m.
Bioregional distribution: c Central Coast (n Monterey Co.)
Synonyms: Haplopappus eastwoodiae H.M. Hall
Horticultural information: In cultivation.