Part 2, 1915] CARDUACEAE : TAGETEAE 177 



16. Thymophylla villosula Rydberg, sp. now 



A depressed perennial, suffruticose and cespitose at the base; stems 5-8 em. high, diffusely 

 branched, villosnlous; leaves crowded, canescenlly villosulous, mostly opposite, pinnatifid 

 into 5-7 short, subulate-filiform, spinulose-lipped segments; peduncles 2 4 cm. long; involucre 

 turbinate, 4-5 mm. high, 6-7 mm. broad; bracts in two series, with membranous margins 

 and 1-3 glands, glabrous except the ciliate margins, the outer bracts oblong-linear, acute, the 

 inner ones broadly oval; ligules 4 mm. long, nearly 2 mm. wide; disk-corollas 2-2.5 mm. long; 

 achenes 3 mm. long, sparingly hispidulous or glabrate; pappus double; inner 5 squamellae 

 lanceolate, awn-tipped, 2.5 mm. long; outer 5 squamellae oblong, less than 1 mm. long. 



Type collected in western Texas, C. Wright (herb. N. Y. Bot. Gard.). 

 Distribution: Western Texas and Coahuila. 



17. Thymophylla Berlandieri (DC.) Rydberg. 



Hymenaiherum Berlandieri DC. Prodr. 5: 642. 1836. 



A low puberulent perennial, suffruticose at the base; stems diffusely branched, including the 

 peduncles 1-1.5 dm. high, puberulent; leaves mostly opposite, crowded on the short branches, 

 1-2 cm. long, sparingly puberulent, pinnatifid, with 7-11 filiform spinulose-tipped divisions; 

 peduncles about 3 cm. long; involucre 4-5 mm. high, 5-7 mm. broad, turbinate, with a few 

 subulate, minute accessory bracts; principal bracts in two series, wholly coalescent below, the 

 inner with ovate tips, the outer lanceolate, with the ciliate free margins decurrent to about 

 the middle of the involucre; ligules 2-3 mm. long, 1 mm. wide; disk-corollas 2 mm. long; 

 lobes ovate; achenes 2 mm. long, sparingly hispidulous on the angles; pappus double; inner 

 5 squamellae about 2 mm. long, awned, the outer 5 oblong and obtuse, erose. 



Type locality: Between Santander and Vittoria, Tamaulipas. 

 Distribution: Texas and Tamaulipas. 



18. Thymophylla puberula Rydberg, sp. nov. 



A puberulent perennial, suffruticose at the base; stems 1-2 dm. high, densely puberulent, 

 much branched; leaves mostly 2-4 cm. long, opposite, densely puberulent, pinnatifid with 

 filiform divisions; peduncles about 5 mm. long; involucre turbinate, puberulent, 5-6 mm. 

 high, 7-8 mm. broad, with a few subulate, minute accessory bracts; principal bracts in two 

 series, the inner with triangular tips and 1 -3 glands, the outer lanceolate with 3-5 glands 

 and the free margins decurrent halfway down or more; ligules 4-5 mm. long, 2 mm. wide; 

 disk-corollas 3 mm. long; tube shorter than the trumpet-shaped throat; achenes 3 mm. long, 

 sparingly hispidulous on the angles; pappus double; inner 5 squamellae lanceolate, including 

 the awn 3 mm. long, the outer 5 oblong, 1 mm. long. 



Type collected in the valley of San Luis Potosi, 1877, Schaffner 328 (754) (herb. N. Y. Bot. 

 Gard.). 



Distribution: Texas to Chihuahua, San Luis Potosi, and Hidalgo. 



19. Thymophylla Pringlei Rydberg, sp. nov. 



A perennial, suffruticose at the base; stems 1-2 dm. high, diffusely branched, viscid- 

 puberulent ; leaves opposite, puberulent, about 2 cm. long, pinnatifid into 5-9 filiform, spinulose- 

 tipped segments; peduncles slender, 2-5 cm. long; involucre campanulate, 4 mm. high, 3-4 

 mm. broad, finely pruinose-puberulent, naked or with 1-3 minute, subulate accessory bracts; 

 principal bracts in two series, united high up, the inner with triangular tips and 1-3 glands, 

 the outer linear, with 3-5 glands and the free margins decurrent; ligules yellow, 4 mm. long, 

 1.5-2 mm. wide; disk-corollas 3 mm. long; achenes 3 mm. long, glabrous; pappus double; 

 inner 5 squamellae 3 mm. long, awn-tipped, the outer 5 only 1 mm. long, spatulate, obtuse. 



Type collected on calcareous soils, hills near Chihuahua, 1886, Pringle 1022 (herb. Columbia 

 Univ.). 



Distribution: Arizona and Chihuahua. 



