24 7 j FLORA OF COLUMBIA AND VICINITY IO5 



178. 0. vulpinoidea Michx. 



All low grounds; abundant and variable. 



New Brunswick to Manitoba; Florida to Texas. 



179. C. gravida Bailey. 

 Rich oak woods; scarce. 



Illinois to South Dakota ; Missouri to the Indian Ter- 

 ritory. 



179a. O. gravida laxifolia Bailey. 

 Common in the woods south of Grindstone creek. 

 Range of the type. 



I So. O. conjuncta Boott. 



Common in swales and along ditches and streams. 



New Jersey to Michigan and Minnesota; Florida to 

 Texas. 



181. C. stipata Muhl. 

 Swamp south of Hinkson creek. 



Newfoundland to British Columbia; Florida to Cali- 

 fornia. 



182. 0. Crus-corvi Shuttlw. 

 Swamp at Brushwood lake; rare. 



District of Columbia to Michigan and Minnesota; 

 Florida to Texas. 



183. O. interior Bailey. 

 Low meadows; frequent. 



Maine to Minnesota; Florida to Kansas. 



184. 0. tribuloides Wahl. 



Marsh meadows; frequent and variable. 



New Brunswick to Manitoba; Florida to Arizona. 



184a. O. tribuloides Bebbii Bailey. 

 Marsh meadows. 

 Range of the type. 



184b. C. tribuloides moniliformis (Tuckerm.) Britton 

 \_C. tribuloides reducta Bailey]. 



Alluvial meadows; common. 



New Brunswick to North Dakota; New York to Mis- 

 souri. 



