Jepson Flora Project: Jepson Interchange    

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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.



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.



Annual or perennial herb, generally rough-hairy
Leaves alternate, reduced upward; blades oblong to ± ovate in CA, entire to pinnately lobed
Inflorescence: heads generally radiate, 1 or in leafy cyme; peduncles slender, bracts 0–few; involucre hemispheric; phyllaries in 2–3 series, generally reflexed in fruit; receptacle rounded to spheric, chaffy or bristly
Ray flowers 0–many, sometimes sterile; ligules showy, yellow to red, purple or multicolored, generally deeply 3-lobed
Disk flowers many; corollas yellow to red or purple, generally long-hairy; style tips long, tapered
Fruit obpyramidal, generally hairy; pappus of 5–10 scales, often awn-tipped
Species in genus: ± 28 species: Am
Etymology: (Gaillard de Merentonneau, French botanist, 1700's)


G. aristata Pursh

Perennial 2–7 dm, generally erect
Leaves: lower 5–15 cm
Inflorescence: heads generally 1–2; peduncles 8–20 cm; phyllaries 9–11 mm, acuminate; receptacle bristles clearly > fruits
Ray flowers generally (6–) 13(–16); ligules 10–35 mm, yellow or base purple
Disk flowers: corollas 7–9 mm, purple or brown, densely purplish woolly
Fruit 3–4 mm, densely hairy; pappus 7–10 mm, awn ± 2 X body
Chromosomes: 2n=34,36, 68,72
Ecology: Uncommon. Open sites, grassland
Elevation: < 2000 m.
Bioregional distribution: e Cascade Range, Sierra Nevada, Southwestern California
Distribution outside California: to British Columbia, ND, Colorado; native to Oregon, British Columbia
Sometimes cultivated.

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bioregional map for GAILLARDIA%20aristata being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Gaillardia aristata
Retrieve dichotomous key for Gaillardia
Retrieve multiple-entry key (MEKA) for Gaillardia
Overlay Consortium of California Herbaria specimen data by county on this map
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