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.
Perennial or subshrub
Leaves opposite below, alternate above
Inflorescence open; heads discoid, few; phyllaries in several series, outer short, ovate, inner lanceolate; receptacle ± flat, naked
Flowers 2530; anther bases ± rounded, tips ovate or oblong; style branches, ± 1.5 mm, club-shaped
Fruit ellipsoid to obconic, 45-ribbed; sides densely hairy; pappus of bristles and scales
Species in genus: 3 species: sw US, nw Mex
Etymology: (Greek & Latin: side crown, from pappus)
Reference: [King & Robinson 1987 Monogr Syst Bot Missouri Bot Garden 22:237239]
Native |
Subshrub < 60 cm
Leaves thin; blades 310 mm (<< glandular petioles), lanceolate to ± diamond-shaped, generally few-toothed, glabrous or ± glandular
Inflorescence: heads 611 mm; phyllaries ± 25, 2.56 mm, glandular, tips darker, generally recurved
Flowers: corollas 45 mm
Fruit 34 mm; pappus bristles 1016, 2.55 mm, scales 1012, 12 mm
Chromosomes: 2n=18
Ecology: Common. Rocky creosote-bush scrub
Elevation: < 1300 m.
Bioregional distribution: Desert
Distribution outside California: to Utah, Arizona, nw Mexico
Flowering time: MarMay, OctJan
Synonyms: Hofmeisteria p. A. Gray