CARDUACEAE 1293 



1. Amblyolepis setigera DC. Steins smooth and glabrous or sparingly villous-hir- 

 sute, 1-5 dm. tall, simple or loosely branched. Leaf-blades spatulate at the base of the 

 stem to oblong or oblong-ovate above, entire, ciliate, the upper ones more or less clasping : 

 heads peduncled : involucral bracts lanceolate to elliptic-lanceolate, acuminate, ciliate, 

 acute : ligules of the ray-flowers golden yellow, 2-2.5 cm. long, 3-4-lobed : achenes 3-4 

 mm. long, silvery-pubescent : pappus-scales broadly ovate, about as long as the achene. 



On prairies, Texas. 



125. GAILLARDIA Foug. 



Annual, biennial or [perennial, scapose or caulescent herbs with pubescent foliage. 

 Leaves alternate, sometimes basal : blades entire, toothed or pinnatifid. Heads radiate, or 

 discoid, long-peduncled. Involucres broad : bracts in 2-3 series, at least those of the outer 

 series spreading or reflexed. Eeceptacle convex or subglobose, bristly, fimbrillate, the bract- 

 lets slender. Kay-flowers neutral, or rarely pistillate, or wanting : ligules yellow or purple, 

 or both. Disk-flowers perfect, fruit-producing : corollas tubular ; lobes with jointed hairs. 

 Anthers sagittate or auricled at the base. Stigmas appendaged. Achenes broadened up- 

 ward, 5-ribbed, pubescent at least near the base. Pappus of 6-12 1-nerved awned scales, 

 exceeding the achene in length. 



Stigmas tipped with glabrous appendages rarely twice as long as thelbrush-like tuft. 



Leaf-blades pinnately veined and pinnatifid. 1. G. suavts. 



Leaf -blades 3-ribbed, merely toothed. 2. G. trinervata. 



Stigmas tipped with filiform pubescent appendages. 



Fimbrillae of the receptacle obsolete, or merely short teeth. 



Disk yellow. 3. O. chrysantha. 



Disk purple or brown. 



Heads long-peduncled : branches pliable, widely spreading. 4. O. lanceolata. 



Heads short-peduncled : branches rigid, erect or nearly so. 5. G.fastigiata. 



Fimbrillae of the receptacle bristle-like or subulate. 



Disk-corollas with subulate acute lobes, which sometimes have bristle-like or 



apiculate cusps. 6. G. pulchella. 



Disk-corollas with broad, obtuse or obscurely apiculate lobes. 



Leaf-blades entire or shallowly toothed : achenes villous only at the base. 7. G. amblyodon. 

 Leaf-blades pinnatifid : achenes villous all over. 8. G. pinnatiflda. 



1. Gaillardia suavis (A. Gray) Britton & Rusby. Annual or biennial, sparingly 

 pubescent. Leaves basal ; blades spatulate or oblong-spatulate, 3-12 cm. long, bipinnati- 

 fid : scapes solitary or several together, 2-7 dm. tall, simple : involucral bracts oblong to 

 lanceolate, 6-9 mm. long, acute : ray-flowers wanting or abortive, or sometimes present : 

 achenes cuneate, 2.5 mm. long, densely pubescent : pappus-scales twice as long as the 

 achenes, with oblong or obovate bodies and slender tips as long as the bodies. 



On prairies, Texas. Spring. 



2. Gaillardia trinervata Small. Similar to G. suavis in habit. Leaf-blades spatulate 

 or oblong-spatulate, 6-9 cm. long, merely toothed, 3-ribbed : scape closely pubescent under 

 the head, simple : involucral bracts reflexed : ray-flowers wanting or obsolete. 



In dry soil, the Indian Territory and Texas. Spring. 



3. Gaillardia chrysdntha Small. Annual or biennial, finely pubescent. Stems 3-6 

 dm. tall, usually with few elongated more or less spreading branches : leaf-blades spatulate 

 or oblong-spatulate on the lower part of the stem to linear or oblong-linear above, 2-8 cm. 

 long, undulate or remotely sinuate-toothed : heads long-peduncled: involucral bracts 7-11 

 mm. long, the outer triangular or lanceolate-triangular, the inner lanceolate : ligules of 

 the ray-flowers yellow, 1-1.5 cm. long, 3-cleft, the middle lobe the narrowest : disk light 

 yellow, 1.5-2 cm. broad : achenes about 1.5 mm. long : pappus-scales about 4 times as long 

 as the achene, the tips longer than the bodies. 



On dry or sandy prairies, Texas. Spring to fall. 



4. Gaillardia lanceolata Michx. Annual or sometimes biennial, cinereous-pubescent. 

 Stems 3-7 dm. tall, loosely branched, the branches long and spreading : leaf-blades spatu- 

 late to oblong or linear, 1.5-8 cm. long, acute, entire or remotely serrate, sessile, at least 

 above the base of the stem : involucral bracts oblong to lanceolate, 8-12 mm. long, acute or 

 acuminate: heads long-peduncled: ligules of the ray -flowers yellow, 1.5-2 cm. long, 

 3-cleft : disk purple, 1.5-2 cm. broad : receptacle naked or nearly so : achenes 1.5-2 mm. 

 long : pappus-scales 3-4 times as long as the achene, the very slender tips longer than the 

 bodies. 



In pine lands and on prairies, South Carolina and Kansas to Florida and Texas. Spring and 

 summer. 



5. Gaillardia fastigiata Greene. Annual or biennial, finely cinereous-pubescent. Stem 

 2-4 dm. tall, simple or with few or several rigid erect or nearly erect branches : leaf -blades 



