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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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ASTERACEAE

SUNFLOWER FAMILY

David J. Keil, Family Editor and author, except as specified

Annual to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1–many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1–many 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)4–5; stamens 4–5, 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):1–28. See glossary p. 25 for illustrations of general family characteristics.

GUTIERREZIA

SNAKEWEED, MATCHWEED

Meredith A. Lane

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 3–4 series, whitish yellow, tips green; receptacle naked, minutely hairy
Ray flowers 1–13; corollas yellow
Disk flowers 1–13 (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 1–2 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 10:7–28]
TOXIC to livestock, fresh or dried in hay.

Native

G. californica (DC.) Torr. & A. Gray

CALIFORNIA MATCHWEED

Subshrub 2–6 dm
Stems sprawling or erect, sometimes reddish
Leaves ± linear
Inflorescence: heads 8–20-flowered, solitary or in groups of 2–3; peduncles generally > 1.5 mm; involucres generally bell-shaped, sometimes obconic, generally < or = 6.5 mm, < 3.5 mm diam; phyllaries generally 9–21 in 3 series
Ray flowers 4–13; corollas 2.5–7.2 mm
Disk flowers 4–13, fertile; corollas 2.3–4.2 mm
Fruit 1–2.8 mm
Chromosomes: 2n=16,24
Ecology: Grasslands, slopes, outcrops, sometimes on serpentine
Elevation: 100–300 m.
Bioregional distribution: Inner North Coast Ranges, San Joaquin Valley, Central Western California, South Coast, Western Transverse Ranges, San Gabriel Mountains, Peninsular Ranges
Distribution outside California: nw Baja California
Synonyms: G. bracteata Abrams
Variable in involucre shape, arrangement of heads
Horticultural information: DRN, DRY, SUN: 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 24.

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bioregional map for GUTIERREZIA%20californica being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Gutierrezia californica
Retrieve dichotomous key for Gutierrezia
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Overlay Consortium of California Herbaria specimen data by county on this map
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