126 UNIVERSITY OF MISSOURI STUDIES [268 



315. 0. Georgiana Small. Georgia hackberry. 

 Rare along streams. 



Maryland to Missouri; Florida to Alabama. 



Family 27. MORACEAE Lindl. Mulberry family. 



115. MORUS L. Mulberry. 



316. M. rubra L. Red mulberry. 

 Frequent along cliffs and streams. 



Vermont to Ontario and South Dakota; Florida to 

 Texas. 



317. M. nigra L. Black mulberry. 

 Occasionally escaped from cultivation. 

 Old World, thence to the New. 



116. MAOLURANutt. [TOXYLON Rai.]. 



318. M. aurantiaca Nutt. \_T. pomiferum Raf.]. Osage 

 orange. 



A frequent escape from hedges. 



Virginia to Missouri; Georgia to Texas; naturalized east- 

 ward and northward. 



117. HUMULUS L. Hop. 



319. H. Lupulus L. Common hop. 

 Grassy thickets and banks of streams. 



Nova Scotia to Manitoba; Florida to Arizona: Europe 

 and Asia. 



118. CANNABIS Tourn. Hemp. 



320. O. sativa L. Common hemp. 

 Roadsides and waste places. 



Asia and Europe, thence to the greater part of North 

 America. 



Family 28. URTICACEAE Reichenb. Nettle family. 



119. URTIOAL. Nettle. 



