169 

 ANACARDIACE^. Sumac Family. 



Rims hirta, (L.) Sndw. Staghorn Sumac. 

 Rhus typhina^ L. 



Collected but once in the southern part of the Missouri 

 valley, in Charles Mix county. 



Rhus glabra, L. Smooth Sumac. 



Common on bluffs and banks of streams from the Mis- 

 souri valley eastward, and in the Black Hills. 



Rims trilobata, Nutt. Skunkbush. 



On dry blufts and hills from the Missouri valley west- 

 ward, common; many specimens have very pubescent 

 leaflets. 



Rims radicans, L. Poison Oak. Poison Ivy. 

 In woods and thickets throughout the state. 



CELASTRACE^. Staff-tree Family. 



Euoiiymus atropurpureous, Jacq. Burning Bush. 

 Wahoo. 



Occasional in woods in the Sioux valley, and up the 

 Missouri river into Charles Mix county. 



Celastrus scaiicleiis, L. Bittersweet. 



Common in woods and thickets throughout the state. 



ACERACE^. Maple Family. 



Acer saccharinum, L,. Silver Maple. Soft Maple. 

 Acer dasycarpum, Bhrh. 



Kxtends up the Sioux river to Flandreau and up the 

 Missouri river to the western edge of Union county the 

 southeastern county. 



Acer saccliarum, Marsh. Sugar Maple. Rock Maple. 

 Acer saccharum, Wang. 



Abundant in coulees and ravines, containing a clear 

 spring creek, at the headwaters of the Little Minnesota 

 river. There are some ten coulees extending from one 



