256 APPENDIX G. BOTANY. 



abundant shrub, of a grayish white aspect, with numerous branches, and 

 crowded, slender leaves. This is one of the numerous species called sage 

 by the hunters. It is found from the plains of the Upper Missouri to the 

 Valley of the Rio Grande, and west to the Colorado. 



Achillea millefolium, Linn. ; Torr. and Gf., Fl. 2, p. 409. With 

 the preceding. It is the woolly form that almost exclusively occurs 

 west of the Mississippi. 



Zinnia grandiflora, Nutt. in Trans. Amer. Phil. Soc. (n. ser.) 7, p. 

 348 ; Torr. and Gr., Fl. 2, p. 298 ; Torr. in Emory's Eep., t. 4, Gray, PL 

 Fendl, p. 81. Main Fork of Red River ; fl. July 2. 



Riddellia tagetina, Nutt. 1. c, p. 3Yl ; Torr. anclGr., Fl. 2, p. 3&2', 

 Torr. in Emory's Rep., t. 5 ; Gray, PI. Fendl., p. 93. Main Fork of Red 

 River ; June 25 — July 8. The pappus is more hyaline and acute than in 

 specimens from other localities in my herbarium. It is also slightly 

 lacerate at the tip, showing something of a transition to R. aracknoidea. 

 The leaves, too, are more woolly and broader than in the more common 

 form of the plant. 



Rtjdbeckia hirta, Linn. ; Torr. and Gr., Fl. 2, p. 307. Witchita 

 Mountains ; fl. June 1. Is B. bicolor distinct from this species ? Dr. 

 Gray remarks, (Plant. Lindh. 2, p. 227,) that in cultivation, the purple 

 brown of the rays is commonly obsolete or wanting in all the later 

 heads. 



Echinacea angustifolia, DC. Prodr. 5, p. 554 ; Torr. and Gr., FL 

 2, p. 306. Witchita Mountains; June 1. 



Lepachys columnaris, Torr. and Gr., Fl. 2, p. 815. RudbccJcia 

 columnaris, Pursh, FL 2, p. 575. Common on all the tributaries of the 

 Red River ; June. 



Helianthus petiolaris, Nutt. in Jour. Acad. Philad. 2, p. 115; 

 Sweet "Brit. Fl. Gard. (n. ser.) t. 75. With the preceding. 



Gaillardia fulchella, Foug. ; DC. Prodr. 5, p. 652 ; Torr. and 

 Gr., Fl. 2, p. 366. Common on the upper tributaries of the RedRiver^ 

 May — June. 



Palafoxia callosa, Toit. and Gr., Fl. 2, p, 369. Stevia calhsa, 

 Nutt, in Jour. Acad. Philad. 2, p. 121 ; Bart. Fl. Amer. Sept., t. 46. 

 (Z.foliis latioribus. Tributaries of the Washita ; June, 



