FLOWERING PLAXTS AXD FERXS OF ARIZOXA 631 



(no. 330), and at one time introduced on the campus of the University 

 of Arizona at Tucson (Thomber in 1904). Missouri and Kansas to 

 Louisiana, Texas, and northern Mexico. 



The large white to rose-colored flowers are very handsome. 



15. Oenothera rosea Ait., Hort. Kew. 2: 3. 1789. 



Hartmannia rosea G. Don in Sweet, Hort. Brit. ed. 3, 236. 

 1839. 



Pinal, Cochise, Santa Cruz, and Pima Counties, 1;000 to 5,500 feet, 

 occasional in river bottoms and canyons, May to July. Texas and 

 southern Arizona to Bolivia. 



16. Oenothera kunthiana (Spach) Munz, Amer. Jour. Bot. 19: 759. 



1932. 



Hartmannia kunthiana Spach, Paris Mus. Hist. Nat. Xouv. 

 Ann. 4: 363. 1835. 



Fort Huachuca, Cochise County (Wilcox in 1892). Western Texas 

 to southeastern Arizona and central Mexico. 



17. Oenothera flava (A. Xels.) Munz, Amer. Jour. Bot. 17: 361. 



1930. 



Lavauxia flava A. Xels., Torrey Bot. Club Bui. 31: 243. 1904. 

 Lavauxia hamata Woot. and Standi., Contrib. U.S. Natl. Her- 

 barium 16: 154. 1913. 



Navajo, Coconino, Mohave, Yavapai, and Gila Counties, 5,000 to 

 9,000 feet, fairly damp flats and meadows, May to September. Can- 

 ada to Xew Mexico, California, Arizona, and Mexico. 



18. Oenothera taraxacoides CWoot. and Standi.) Munz, Amer. Jour. 



Bot. 17: 362. 1930. 



Lavauxia taraxacoides TVoot. and Standi., Contrib. U. S. Natl. 

 Herbarium 16: 155. 1913. 



Apache, Navajo, Coconino, and Graham Counties, particularly in 

 the White Mountains, 5,000 to 8,000 feet, sandy soil in pine forests, 

 May to August. "Western Texas to Arizona and Chihuahua. 



19. Oenothera brachycarpa A. Gray, PI. Wright. 1: 70. 1852. 



Lavauxia brachycarpa Britton, Torrey Bot. Club Mem. 5: 235. 

 1894. 



Navajo, Coconino, Cochise, and Pima Counties, 4,000 to 6,000 feet, 

 rare on dry slopes and benches, May to July. Idaho to Texas, Arizona, 

 and Chihuahua. 



Represented in Arizona by var. wrightii (A. Gray) Leveille (Oeno- 

 thera wrightii A. Gray, Lavauxia wrightii Small). 



20. Oenothera leptocarpa Greene, Pittonia 1: 302. 1889. 



Eulobus calif ornicus Nutt. ex Torr. and Gray, Fl. North Amor. 

 1: 515. 1840. 



Yavapai, Mohave, Pinal, Maricopa, Pima, and Yuma Counties, 

 below 4,500 feet, dry slopes and plains, February to May. Western 

 Arizona and southern California to Sonora and Baja California. 



The cruciferlike aspect of this plant is striking. 



