l80 UNIVERSITY OF MISSOURI STUDIES [328 



302. MERIOLIX Raf. 



740. M. serrulata (Nutt.) Walp. [Oenothera serrulata Nutt.]. 

 Tooth-leaved evening primrose. 



Common on the plains and foothills, 5100-8000 ft. (Daniels, 



38). 



Manitoba to Saskatchewan ; Texas to xA.rizona. 



303. GAURA L. Gaura.* 



741. G. parviflora Dougl. Small-flow^ered gaura. 

 Frequent on the plains, mesas, and lower foothills, 5100-7000 



ft. (Daniels, 263). 



South Dakota to Washington ; Louisiana to Arizona 

 and Sonora. 



742. G. coccinea Piirsh. Scarlet gaura. 



Abundant on the plains and mesas, and in meadows on 

 lower hillslopes, 5100-6300 ft. (Daniels, 12). 



Manitoba to Montana ; Texas to Arizona and Mexico. 



743. G. glabra Lehm. Smooth gaura. 

 At Boulder (Rydberg). 



South Dakota to Montana ; Colorado to Arizona. 



304. CIRCAEA L. Enchanter's nightshade. 



744. C. alpina L. Alpine enchanter's nightshade. 

 Locally abundant along streams in shady canons, 5700-8000 



ft. (Daniels, 279). 

 Labrador to Alaska ; Georgia to Colorado : Europe : Asia. 



*"Gaura and allied evening flowering plants have a special bee-visi- 

 or, Halicttts galpttisiae Cockerell, which has been taken by my wife at 

 Boulder. It flies in the evening, at 7:30 p. m., when the other bees 

 have retired." — Prot. T. D. A. Cockerell, in a letter to the author, Jan. 

 23, 1908. 



