138 NORTH AMERICAN FLORA [.Volume 34 



merely lobed or toothed; peduncles 1-2 dm. long, rather slender; involueral bracts lance- 

 subulate, acuminate or attenuate, canescent, more or less villous below with flat hairs; fimbrillae 

 of the receptacle subulate, about equaling the achenes; ray-flowers neutral; ligules yellow, not 

 conspicuously veined, 8-10 mm. long, about 5 mm. wide, disk 15-20 mm. broad; corollas 5 

 mm. long, yellow with purplish limb; tube nearly 1 mm. long, glabrous; throat campanulate 

 to elongate-funnelf orm ; lobes triangular, glandular-hispid ; achenes 3 mm. long, densely silky- 

 hirsute; squamellae 6 mm. long, lanceolate, attenuate into an awn-tip, surpassing the disk- 

 corollas. 



Type locality: On the Canadian. 



Distribution: Western Texas, Colorado, and southern Utah to Coahuila and Durango. 



18. Gaillardia nervosa Rydberg, sp. nov. 



A cespitose perennial; stems decumbent at the base, much branched, sparingly villous, 

 2-3 dm. high; leaves 4-7 cm. long, pinnatifid with linear or lance-oblong, acute divisions, 

 sparingly villous, green; peduncles about 1 dm. long; involueral bracts lanceolate, acuminate, 

 about 7 mm. long, villous; fimbrillae of the receptacle subulate, much shorter than the achenes; 

 ray-flowers pistillate (always?); ligules about 1 cm. long, 8 mm. wide, yellowish-pink with 

 very strong purplish veins; disk 15-20 mm. broad; corollas olive-brown, 5 mm. long; tube less 

 than 1 mm. long; throat campanulate, more or less glandular-puberulent ; lobes triangular, 

 glandular-hispid; achenes 3 mm. long, densely long-hirsute, the hairs almost covering the 

 squamellae, which are lanceolate, 4 mm. long, with a short awn-tip. 



Type collected at Carneros Pass, Coahuila, September 11, 1889, Pringle 2309 (herb. N. Y. Bot. 

 Gard.). 



Distribution: Coahuila to Zacatecas. 



19. Gaillardia gracilis A. Nelson, Bot. Gaz. 37: 276. 1904. 



A caulescent perennial, with a woody root and a short branched caudex; stems several, 

 somewhat branched, puberulent and villous, 3-7 dm. high, straw-colored; leaves sparingly 

 short-villous, oblanceolate in outline, 4-8 cm. long, from entire to more or less pinnatifid, 

 with oblong to rounded-ovate lobes; peduncles 1-2 dm. long; involueral bracts 8-10 mm. 

 long, lanceolate, acuminate, canescent and sparingly villous-ciliate; fimbrillae of the receptacle 

 subulate, shorter than the achenes; ray-flowers neutral; ligules yellow, about 15 mm. long 

 and 10 mm. wide; disk hemispheric, about 2 cm. broad; corollas about 5 mm. long, yellow 

 below, purple above; tube very short, glabrous; throat cylindro-f unnelform ; lobes triangular, 

 glandular-hispid; achenes densely long-villous; squamellae about 10, narrowly lanceolate, 

 attenuate into a slender awn, about equaling the disk-corollas. 



Type locality: Diamond Valley, Utah. 

 Distribution: Utah. 



20. Gaillardia crassa Rydberg, sp. nov. 



A subscapose perennial, with a thick root and a cespitose caudex; stems 2-3 dm. high 

 leafy mostly at the base, puberulent and sparingly villous, striate; leaves mostly basal and a 

 few on the lower portion of the stem, spatulate or oblanceolate in outline, 5-8 cm. long, more 

 or less deeply lobed or coarsely toothed, rather thick, long-villous; peduncles 1-2 dm. long, 

 rather stout; involueral bracts 8-10 mm. long, lanceolate, acuminate, densely villous with 

 long flat hairs; fimbrillae of the receptacle subulate, slightly shorter than the achenes; ray- 

 flowers neutral; ligules yellow, 10-13 mm. long, 4-6 mm. wide; disk 15-20 mm. broad, hemi- 

 spheric; corollas 6 mm. long, yellow below, purple above; tube glabrous, less than 1 mm. long; 

 throat cylindro-funnelform, puberulent; lobes triangular, glandular-hispid; achenes nearly 

 4 mm. long, densely hirsute; squamellae lanceolate with a distinct midrib, gradually acuminate, 

 into a slender awn, including the awn about 7 mm. long and slightly exceeding the corollas. 



Type collected in the foothills of the Santa Rita Mountains, Arizona, May 12, 1884, C. G. 

 Pringle (herb. Columbia Univ.). 



Distribution: Arizona and western New Mexico. 



