lyo UNIVERSITY OF MISSOURI STUDIES [S I 2 



599. E. Missouriensis (Norton) Small \Tithymalus Mis- 

 sourietisis (Norton) Small]. Missouri spurge. 



Infrequent in meadows and flats. 



Minnesota to Washington; Missouri to New Mexico. 



600. E. Oyparissias L. Cypress spurge. 

 Roadsides and cemeteries; frequent. 



Europe, thence to the Eastern United States. 



Family 60. CALLITRICHACEAE Lindl. Water starwort 

 family. 



235. OALLITRIOHE L. Water starwort. 



601. O. Austini Engelm. \_C. deflexa A7tsH?ii (Engelm.) 

 Hegelm.]. 



Muddy shores of the waterworks dam; very rare. 

 New York to Illinois and Missouri; New Jersey to 

 Louisiana and Mexico. 



Order 24. SAPINDALES. 



Family 61. ANACARDIACEAE Lindl. Cashew family. 



236. RHUS L. iSCHMALTZIA Desv.]. Sumac. 



602. R. glabra L. [.S. glabra (L.) Small]. Smooth sumac. 

 Thickets and open wooded hillsides; common. 



Nova Scotia to British Columbia; Florida to Arizona. 



603. R. copallina L. [5. copallma (L.) Small]. Dwarf 



SUMAC. 



Dry thickets and summits of cliffs; scarce. 

 Maine and Ontario to Minnesota and Nebraska; 

 Florida to Texas. 



604. R. aromatica Ait. [i2. Ca?iade?isis Marsh.: S. aro- 

 matica (Ait.) Desv.]. Fragrant sumac 



Rocky woods and cliffs; common. 



New England and Ontario to Saskatchewan; Florida to 

 Louisiana. 



