108 UNIVERSITY OF MISSOURI STUDIES [256 



129. BISTORTA Tourn. Bistort. 



349. B. bistortoides (Pursh) Small [Polygonum Bistorta ob- 

 longifolium Meisn.]. Oblong-leaved bistort. 



Along Arapahoe Trail and above timberline on Arapahoe 

 Peak, 8600-13000 ft. (Daniels, 890). 



Montana to Washington ; New Mexico to California. 



350. B. vivipara (L. ) S. F. Gray [Polygonum viviparum L.]. 

 Alpine bistort. 



Above timberline, Arapahoe Peak, 1 1000- 12000 ft. (Daniels, 

 894). Also Eldora to Baltimore (Rydberg). Redrock lake, 

 10100 ft. (Ramaley & Robbins). 



Greenland to Alaska ; New Hampshire to Colorado : Eu- 

 rope: Asia. 



130. TINIARIA Reichenb. False Buckwheat. 



351. T. Convolvulus (L.) Webb. & Moq. [Polygonum Con- 

 z'oh'ulus L.]. Black bindweed. Common false buck- 

 wheat. 



Along railroads and roads ; throughout the cultivated area 

 as a weed in fields, 5100-9000 ft. (Daniels, 484). 

 Europe and Asia, thence to North America. 



Order 20. CHENOPODIALES. 

 Family 37. CHENOPODIACEAE Dumort. Goosefoot family. 



131. CHENOPODIUM L. Goosefoot. Lamb's quar- 



ters. Pigweed. 



352. C. leptophyllum Nutt. Narrow-leaved goosefoot. 

 Common in the plains, mesas, and gullies of the foothills and 



mountains, 5100-8000 ft. (Daniels, 604). 



Nebraska to Montana ; Missouri to Arizona. 



353. C. oblongifolium ( S. Wats.) Rydb. [C. leptophyllum ob- 

 longifolium S. Wats.]. Oblong-leaved goosefoot. 



Common in dry places on the plains and mesas, 5100-7000 

 ft. ( Daniels, 994 ) . 



North Dakota to Wyoming ; Missouri and Texas to Ari- 

 zona. 



