l62 UNIVERSITY OF MISSOURI STUDIES [3O4 



544a. S. biflora hispidissima (Michx.) Pollard & Ball. 

 Barren hills; apparently more frequent than the type. 

 Range of the type. 



216. DESMODIUM Desv. [MEIBOMIA Heister]. 

 Tick-trefoil. 



545. D. nudiflorum (L.) DC. \^M. niidiflora (L.) Kuntze]. 

 Common in oak forests and thickets. 



Quebec to Minnesota; Florida to Louisiana and Kan- 

 sas. 



546. D. grandiflorum (Walt.) DC. \p. acumi7iatum 

 (Michx.) DC: M. graiidiflora (Walt.) Kuntze]. 



Very common in upland oak forests. 



Quebec to Minnesota and South Dakota; Florida to 

 Texas. 



547. D. pauciflorum (Nutt.) DC. \_M. pauciflora (Nutt.) 

 Kuntze]. 



Oak forests and thickets; infrequent. 

 New York and Ontario to Michigan and Missouri; 

 Florida to Texas. 



548. D. Michauxii (Vail) Daniels {D. rotujidifolium 

 (Michx.) DC: M. Michauxii N^\\\ 



Dry oak forests and thickets; scarce. 



Maine to Ontario and Minnesota; Florida to Louisiana. 



549. D. sessilifolium (Torr.) T. & G. \M. sessilifolia (Torr.) 

 Kuntze]. 



Dry oak forests; uncommon. 



Massachusetts to Michigan; Kentucky and Mississippi 

 to Kansas and Texas. 



550. D. canescens (L.) DC. \_M. catiesce?is (L.) Kuntze]. 



Hoary tick-trefoil. 

 Rich woods and banks of streams; common. 

 Massachusetts to Minnesota and Nebraska; Florida to 

 Texas. 



55pa. D. canescens hirsutum Hook. \_M. canescens hir- 

 suta (Hook.) Vail]. 

 Common in thickets. 

 Missouri. 



