TREATMENT FROM THE JEPSON MANUAL (1993) |
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©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.
Annual to subshrubs, appearing glabrous
Stems single and branching above or branching from base, ascending, < 1.5 m, ± striate, generally fibrous, gummy, minutely scabrous, yellow to tan or gray
Leaves alternate, sometimes in axillary clusters, entire, gland-dotted, sometimes gummy, glabrous or minutely scabrous, dark gray-green
Inflorescence: heads radiate, solitary or in short-peduncled clusters; involucres narrowly to widely obconic; phyllaries in 34 series, whitish yellow, tips green; receptacle naked, minutely hairy
Ray flowers 113; corollas yellow
Disk flowers 113 (in CA species); corollas yellow, club- or narrowly funnel-shaped, lobes short, recurved; style appendages lanceolate
Fruit narrowly obconic, light tan, hairy; hairs appressed, white; pappus of 12 series of finely toothed, white or yellowish scales generally 1/2 fruit length (in CA species) or much reduced
Species in genus: 25 species: 10 w North America, 15 South America
Etymology: (Gutierrez, surname of a noble Spanish family)
Reference: [Lane 1985 Syst Bot 10:728]
TOXIC to livestock, fresh or dried in hay .
Native |
Subshrub 26 dm, much-branched, often nearly spheric
Stems brown below, yellow or green above
Leaves linear to thread-like
Inflorescence: heads 13-flowered, in groups of 56, sessile; involucres generally < 3.2 mm, < 1.2 mm diam, cylindric; phyllaries 46 in 2 series
Ray flowers 12; corollas 2.13.5 mm
Disk flowers 12, functionally staminate; corollas 2.23.3 mm
Fruit 11.5 mm
Chromosomes: 2n=8,16,24,32
Ecology: Grasslands, sand dunes
Elevation: 18002500 m.
Bioregional distribution: South Coast, San Bernardino Mountains, Peninsular Ranges, East of Sierra Nevada, Desert
Distribution outside California: to Colorado, c Mexico
Flowering time: JulOct
Horticultural information: DRN, DRY, SUN: 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24.