X32 UNIVERSITY OF MISSOURI STUDIES [274 



verging toward P. dumetorum L., others towards P. cristatum 

 Engelm. & Gray. 



Nova Scotia to the Rocky Mountains; Florida to Louis- 

 iana. 



129. FAGOPYRUM Gaertn. Buckwheat. 



354. F. esculentum Moench \F. Fagopyrum{l.:)Y.Sir^X\ 

 Occasional in waste places. 

 Europe and Asia, thence to North America. 



Order 19. CENTROSPERMALES. 



Family 32. CHENOPODIACEAE Dumort. Goosefoot 

 family. 



130. OHENOPODIUM L. Goosefoot. 



355. O. hybridum L. Maple-leaved goosefoot. 

 Common in waste places, especially in shade. 



Quebec to the Northwest Territory; New York to New 

 Mexico and Utah: Europe. 



356. 0. urblcum L. City goosefoot. 



Common about houses and along streets; not seen outside 

 the city limits. 



Europe, thence to Canada and the United States. 



357. O. Berlandieri Moq. 

 Dry waste grounds; scarce. 

 Florida; Missouri to Texas. 



358. O. album L. Lamb's-quarters. Pigweed. 

 Everywhere in waste and cultivated grounds. 

 Europe and Asia, now a cosmopolitan weed. 



359. 0. ambrosioides L. Mexican tea. 

 Waste places; locally frequent. 



Tropical America, thence to all mild and warm lands. 



360. O. antbelminticum L. \C. ambrosioides anthelminti- 

 cum (L.) Gray]. Wormseed. 



