ROBINSON AND GREENMAN. — GENUS VERBESINA. 541 



576. — Valley of Mexico, Santa Fe, Bourgeaii, no. 377, Tacubaya, 

 Schaffner, no. 242; Durango, E. W. Nelson, no. 4600, Palmer, no. 318 

 (coll. of 1896). 



* * * * Peduncles long and wingless ; stems also wingless throughout. 

 I- Species of Mexico and S. W. United States. 



*+ Leaves chiefly opposite, very obtuse, narrowed to a distinct although winged 



petiole. 



17. V. LONGiPES, Hemsl. Biol. Cent.-Am. Bot. ii. 188. — Mexico 

 witliout locality, Coulter, no. 342. To this species we should refer 

 Pringle's no. 3215, collected on rocky hillsides, San Jose Pass, State of 

 San Luis Potosi, 22 July, 1890. 



•w- -w- Leaves chiefly alternate, the upper lanceolate, narrowed to an obtuse apex, 

 sessile by a somewhat contracted but auriculate-clasping base : involucral 

 bracts narrowly oblong. 



18. V. Rothrockii. Stems erect, herbaceous, 6 dm. liigh, usually 

 simple and 1 -headed, terete, puberulent, scabrous, 1 to 4 from a thickish 

 woody stock : leaves oblong-obovate, crenate-dentate from below the 

 middle, green and scabrous-pubescent on both sides, 5 to 8 cm. long, 

 half as broad, amplexicaul by two broad basal auricles : peduncles long, 

 naked, terminal, rarely branched: heads 1.5 to 2 cm. broad exclusive of 

 rays ; involucral scales about 2-seriate, not very unequal, oblong, obtuse, 

 hirtellous to strigillose, the inner somewhat erose-dentate : rays 8 to 12, 

 orange-yellow, 1.5 to 2 cm. long: achenes 7 mm. long, broadly winged, 

 glabrous ; pappus obsolete. — V. Wrightii, Gray, Proc. Am. Acad. xix. 

 12, in part, & Syn. Fl. i. pt. 2, 287, in part. Actinomeris Wrightii, 

 Gray, PI. Wright, ii. 89, not of PI. Fendl. ; Rothrock in Wheeler, Rep. 

 vi. 162, t. 8; Hemsl. Biol. Cent.-Am. Bot. ii. 186, excl. pi. Texas. — 

 S. Arizona, Camp Bowie, Dr. J. T. Rothrock, no. 452, Ojo de Gavilan, 

 Tlmrber, no. 1058, foothills of the Sta. Rita Mts., Pringle ; Arizona 

 without locality, Lemmon ; New Mexico, between the Copper Mines and 

 Conde's Camp, Wright, no. 1235; Coahuila, Palmer, nos. 585, 597, 598. 



We take pleasure in dedicating this sjiecies to Dr. Rothrock, who (1. c.) 

 first noted differences between this plant and the Texan species to which 

 it has long been referred. 



■M- -M- ++ Leaves subsessile by a cuneate exauriculate base ; the upper oval : 

 involucral bracts broadly oblong. 



19. V. Lindheimeri. V. Wrightii, Gray, Proc. Am. Acad. xix. 12 

 (1883), in part, & Syn. Fl. i. pt. 2, 287, in part, not Griseb. (1866). 



