122 UNIVERSITY OF MISSOURI STUDIES [264 



Hinton road, some 6yi miles north of Columbia. 



Nova Scotia to Michigan, Western Ontario and South 

 Dakota; North Carolina to Tennessee and Nebraska. 



293. S. cordata Muhl. 



A shrub along streams and in swales: the plants seldom 

 typical, the leaves being more or less pale and glaucous un- 

 derneath. 



New Brunswick and North Carolina across the conti- 

 nent. 



293 a. S. cordata angustata (Pursh) Anders. 

 With the preceding. 

 Range of the type. 



294. S. Missouriensis Bebb [5. cordata vestita Anders.]. 

 Missouri willow. 



A small tree, occasionally, however, of considerable size, 

 along streams and in rich bottoms. 

 Missouri to Nebraska and the Indian Territory. 



Order 14. FAGALES. 



Family 24. BETDLACEAE Agardh. Birch family. 



107. OARPINUS L. Hornbeam. 



295. O. Oaroliniana Walt. Blue beech. 



Common along Bear and Grindstone creeks; seldom along 

 Hinkson creek. 



Nova Scotia to Minnesota and Nebraska; Florida to 

 Texas. 



108. OSTRYA Scop. Hop-hornbeam. 



296. O. Virginica Willd. \0. Virginiana (Mill.) Willd.]. 

 Ironwood. 



Common along streams and on lower hillsides, and in rich 

 woods. 



Cape Breton Island to South Dakota; Florida to 

 Texas. 



