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.
Species in genus: 1 sp.: w North America
Etymology: (Greek: carved side, from sculptured fruit)
Native |
Annual, taprooted, forming small tufts; sap milky
Stems many, semi-prostrate, 25 cm
Leaves 25 cm, lobed; lobes rounded, toothed, margins whitish, hard
Inflorescence: heads ligulate, generally 1 (23 in cymes); involucre 1012 mm, cylindric; phyllaries in 2 series, outer few, linear, inner 712, equal, narrow; receptacle naked
Flowers 716; ligules cream to pale yellow, readily withering
Fruit 4 mm, oblong, often curved, obtusely 5-angled; ribs alternating with 5 rows of pits, abruptly short-beaked; pappus ± 8 mm, of many white bristles, outer falling separately, inner persistent
Chromosomes: 2n=18
Ecology: Local on sandy flats
Elevation: 6002100 m.
Bioregional distribution: s High Sierra Nevada, East of Sierra Nevada, Mojave Desert
Distribution outside California: to Oregon, Utah, Arizona
Flowering time: AprJun
Synonyms: G. setulosa A. Gray
Horticultural information: TRY.