176 UNIVERSITY OF MISSOURI STUDIES [S'S 



250. ALTHAEA L. Marsh mallow. 



633. A. rosea (L.) Cav. Hollyhock. 

 Persisting in old yards and waysides. 



Turkey, Greece and Crete, thence widely cultivated. 



251. MALVA L. [CALLIRRHOE Nutt.]. Mal- 

 low. 



634. M. rotundifolia L. Cheeses. Common mallow. 

 Common in barnyards and about houses. 



Europe and Asia, thence to North America. 



635. M. moschata L. Musk mallow. 

 Fields and roadsides; infrequent. 

 Europe, thence to North America. 



636. M. digitata (Nutt.) T. & G. [C. digitata Nutt.]. 



Poppy mallow. 

 Dry open grounds; very rare. 

 Missouri to Kansas; Arkansas to Texas. 



252. SIDA L. 



637. S. spinosa L. Prickly sida. 

 Common in fields and waste places. 



New York to Michigan and Iowa; Florida to Texas: 

 most tropic lands. 



253. HIBISCUS L. Rose mallow. 



638. H. Trionum L. Bladder ketmia. 

 Infrequent in waste places. 



Europe, thence to Eastern North America. 



Order 27. PARIETALES. 

 Family 71. GUTTIFERAE Juss. Balsam-tree family. 



254. HYPERICUM L. \_SAROTHRA L.]. St. 

 John's-wort. 



639. H. corymbosum Muhl. \H. maculatum Walt.]. 

 Spotted St. John's-wort. 



Low grounds; very common and variable. 



Ontario to Minnesota; Florida to Texas and Kansas. 



