202 
Spring Flora of Oklahoma 
herbs with pubescent fpliage. Leaves alternate or basal, 
entire, toothed or pinnatifid. Heads radiate, long-peduncled. 
Involucre depressed-hemispheric, bracts imbricated in 2 or 
3 series, their tips spreading or reflexed. Receptacle con¬ 
vex or globose, bristly, fimbrillate or nearly naked. Rays 
cuneate, yellow, purple or parti-colored, neutral. Disk- 
flowers perfect, fertile, 5-toothed, the teeth pubescent with 
jointed hairs. Achenes turbinate, 5-ribbed, densely villous. 
Pappus of 6-12, 1 nerved awned scales. 
Stem leafy; style tips with filiform, hispid appendages. 
Rays yellow; fimbrillse exceeding the achenes. 
1. G. aristata, 
Rays purple, or red at base; fimbrillse about equaling 
the achenes. 2. G. pulchella. 
Leaves basal; style-tips with short, naked appendages; 
rays none, or few. 
Leaf-blades pinnately veined and pinnatifid. 
3. G. suavis. 
Leaf-blades 3-ribbed, merely toothed. 4. trinervate. 
1. Gaillardia aristata Pursh. Great-flowered Gaillardia. 
Perennial. Stem hirsute or densely pubescent, with jointed hairs, 
l°-3° high. Leaves densely and finely pubescent, the lower and 
basal ones oblong or spatulate, laciniate, pinnatifid or entire. Upper 
leaves lanceolate or oblong, entire or dentate. Heads broad. 
Rays 10-18, yellow. Fimbrillse of the receptacle mostly longer than 
the achenes. 
On plains and prairies. May-September. Frequent. 
2. Gaillardia pulchella Foug. Showy Gaillardia. Annual, stem 
G'-24' high, hirsute or pubescent, with jointed hairs. Leaves lance¬ 
olate, oblong, or the lower spatulate, entire, dentate or sinuate-pin- 
natifid. Heads l'-3' broad. Rays 10-20, red or purple at the base, 
yellow toward the apex. Fimbrillse of the receptacle equaling or 
scarcely longer than the achenes. 
In dry soil. May-September. Frequent. 
3. Gaillardia suavis (A. Gray) Britton and Rusby. Rayless 
Gaillardia. Annual or biennial. Leaves in a basal tuft, pinnatifid, 
dentate, or some of them entire. Scape 12'-24' high, monocephalous. 
Head about V broad with the odor of heliotrope, globose in fruit. 
Rays none. Fimbrillse of the receptacle obsolete. 
Pappus scales broad, their awns very slender. 
In dry soil. April-June. Common. 
