I02 UNIVERSITY OF MISSOURI STUDIES [250 



Family 30. CORYLACEAE Mirbel. Hazel family. 



116. CORYLUS L. Hazel. 



313. C. rostrata Ait. Beaked hazel nut. 



Abundant in canons in the mesas, foothills, and the moun- 

 tain plateau, 5600-8000 ft. (Daniels, 116). 



Nova Scotia to North Dakota; Georgia to Colorado. 



Order 17. URTICALES. 

 Family 31. URTICACEAE Reichenb. Nettle family. 



117. TIRTICA L. Nettle. 



314. U. gracilis Ait. Slender nettle. 



Common in stream-flats both in and out of shade, 5100- 

 9000 ft. (Daniels, 583). Also mountains between Sunshine 

 and Ward (Rydberg). 



Nova Scotia to Alaska; North Carolina to New Mexico 



118. PARIETAEIA L. Pellitory. 



315. P. Pennsylvanica Muhl. Pennsylvania pellitory. 

 Moist places under rocks and in canons and on shady 



banks of streams, 5100-7000 ft. (Daniels, 498). 



Ontario to British Columbia; Florida to Mexico. 



316. P. obtusa Rydb. Obtuse-leaved pellitory. 

 Sunset Cafion, 6000 ft. (Rydberg). 

 Colorado to Utah; Texas to California. 



Family 32. CANNABINACEAE Lindl. Hemp family. 



119. HUMULUS L. Hop. 



317. H. Lupulus Neo-Mexicanus A. Nels. & Cockerell. New- 

 Mexico hop. 



Rocky banks of canons and along streams and in waste 

 places as along fences, 5100-8000 ft. (Daniels, 573). 

 Wyoming to Utah; New Mexico to Arizona. 



