112 UNIVERSITY OF MISSOURI STUDIES [260 



374. A. graecizans L. [A. albush.]. White pigweed. Tum- 

 ble WEED. 



Common in waste places, especially on the plains, 5100-6000 

 ft. (Daniels, 813). 

 Tropical America, thence throughout North America. 

 141. mOEnCHIA Moench. 



375. P. gTacilis Moq. Slender froelichia. 



Along the railroad between Boulder and Marshall; also 

 along the railroad in Boulder Canon, 5400-6000 ft. (Daniels, 

 476). 



Nebraska to Colorado ; Arkansas to Texas. 

 Family 39. CORRIGIOLACEAE Reichenb. Corrigiola 

 family. 

 142. PARONYCHIA Adans. Whitlowwort. 



376. P. pulvinata Gray. Pulvinate whitlowwort. 

 Massif de 1' Arapahoe, 1 100-13500 ft. (Rydberg). 

 Wyoming and Colorado to Utah. 



377. P. Jamesii T. & G. James's whitlow-wort. 

 Common in open situations throughout, 5100-10000 ft. (Dan- 

 iels, 136). Also mountains between Sunshine and Ward, and 

 at Meadow Park and Lyons (Rydberg). 



Nebraska to Wyoming ; Texas to New Mexico and Mex- 

 ico. 



Family 40. ALLIONIACEAE Reichenb. Umbrella-wort 

 family. 



143. ABKONIA Juss. 



378. A. fragrans Nutt. Fragrant abronia. 



Near Boulder (Tweedy). Valmont Butte, not getting to 

 Boulder (Ramaley). 

 South Dakota to Idaho ; Kansas to New Mexico. 



144. AIXIONIA Loeffl. Umbrella-wort. 



379. A. nyctaginea Michx. [Oxybaphus nyctagineiis Sweet]. 

 Heart-leaved umbrella-wort. 



Plains and mesas, especially about streams, 5100-6000 ft. 

 (Daniels, 113). 

 Illinois to Saskatchewan ; Missouri to Colorado. 



