Part 2, 1915] CARDUACEAE : HELENIEAE 137 



long, densely hirsute; squamellae 5-6 mm. long, lanceolate, rather gradually attenuate into 



an awn. 



Type locality: Louisiana. 



DISTRIBUTION: Sea beaches, Texas to South Carolina and Florida. 



Illustration: Sweet, I?rit. Fl. Card. II. pi. 267. 



14. Gaillardia Amblyodon Gay, Ann. Sci. Nat. U. 12: 62. 1839. 



? Gaillardia scabrosa Buckl. Proc. Acad. Phila. 1861: 459. 1862. 



A caulescent annual; stem 3-5 dm. high, simple or branched above, hispid with crisp hairs; 



leaves sessile, oblong, lanceolate, or oblanceolate, entire or dentate, hispidulous, 3-7 cm. long, 



the upper slightly auriculate at the base; peduncles 3-10 cm. long; bracts 10-12 mm. long, 



lanceolate, chartaceous and appressed at the base, the upper part herbaceous, hispid-ciliate 



and caudate-attenuate; ray-flowers about 12, neutral; ligules brownish-purple, 15-20 mm. 



long, 6-7 mm. wide, 3-lobed; disk purple, 10-15 mm. broad; corollas about 6 mm. long; tube 



1 mm. long, glabrous; throat elongate, campanulate-funnelform; lobes triangular, glandular- 



ciliate; achenes densely long-villous at the base, glabrous above; squamellae lanceolate, 



produced into a short awn, together 5-6 mm. long. 



Type locality: Texas. 

 Distribution: Texas. 



Illustrations: Mem. Am. Acad. II. 3: pi. 4; Meehan, Nat. Fl. 2: pi. 46; Bot. Mag. pi. 6081; 

 Fl. Serres^/. 2149. 



15. Gaillardia mexicana A. Gray (; S. Wats. Proc. Am. Acad. 18: 109. 

 hyponym. 1882), Proc. Am. Acad. 19: 34. 1883. 



Gaillardia pulchella var. A. Gray, PI. Wright. 1: 120. 1852. 



A caulescent perennial; stems 3-5 dm. high, puberulent, often tinged with red, branched 

 below; leaves lanceolate, 2-4 cm. long, rather firm, puberulent, the lower short-petioled and 

 occasionally with oblong lobes, the upper entire and sessile; peduncles 1.5-3 dm. long; involucral 

 bracts lance-subulate, attenuate, 7-10 mm. long; fimbrillae of the receptacle filiform-subulate, 

 as long as the achenes; ray-flowers 10-15, neutral, or wanting; ligules purple, 7-9 mm. long, 

 deeply cleft; disk 12-15 mm. broad, purple; corollas about 5 mm. long; tube very short; throat 

 elongate-campanulate; lobes deltoid, glandular-puberulent; achenes long-hirsute below, gla- 

 brous on the upper part; squamellae lanceolate; body 2 mm. long, produced into an awn fully 

 3 mm. long. 



Type locality: Sierra Madre, south of Saltillo. 

 Distribution: Western Texas, Coahuila, and San Luis Potosi. 



16. Gaillardia linearis Rydberg, sp. now 



A caulescent cespitose perennial, with a short branched suffruticose base; stems 2-3 dm. 

 high, striate, hirsute-strigose; leaves linear or narrowly linear-oblanceolate, entire or with a 

 few rather salient narrow lobes below, 5-8 cm. long, 2-4 mm. wide, grayish short-pubescent; 

 peduncles 1-2 dm. long; involucral bracts 8-10 mm. long, lance-subulate, attenuate, short- 

 villous; fimbrillae of the receptacle subulate, nearly equaling the achenes; ray-flowers neutral; 

 ligules yellow, 10-14 mm. long, 5-6 mm. wide; disk 12-18 mm. broad; corollas 5-6 mm. long, 

 yellow, or yellow below and purple above; tube less than 1 mm. long, glabrous; throat almost 

 campanulate; lobes ovate-triangular, glandular-fimbriate; achenes 3-4 mm. long, densely 

 hirsute; squamellae lanceolate, with strong midrib, produced into a slender awn, about equaling 

 the corolla. 



Type collected at White Water, Chihuahua, June 18, 1892, Mearns 358 (herb. N. Y. Bot. 

 Gard.)'. 



Distribution: Texas to Arizona and Chihuahua. 



17. Gaillardia pinnatifida Torr. Ann. Lye. X. Y. 2: 214. 1827. 



A cespitose perennial, with a branched caudex; stems several, 1-3 dm. high, leafy towards 

 the base, more or less strigose-canescent; leaves 3-8 cm. long, more or less hirsute with crisp 

 hairs, pinnatifid with linear or oblong divisions, or the earlier ones oblanceolate or spatulate, 



