169 

 Anacardiace.E. — Sumac Family. 



Klius liirta, (L.) Sndw. Staghorn Sumac. 

 Rhus typhi na, 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. 



Khiis trilobata, Nutt. Skunkbush. 



On dry bluffs and hills from the Missouri valley west- 

 ward, common; many specimens have very pubescent 

 leaflets. 



Khus radioaiis, L. Poison Oak. Poison Ivy. 

 In woods and thickets throughout the state. 



Celastrace.^. — Staff-tree Family. 



Eiionymus atropurpureous, Jacq. Burning Bush. 

 Wahoo. 



Occasional in woods in the Sioux valley, and up the 

 Missouri river into Charles Mix county. 



Celastrus scaiiclens, L. Bittersweet. 



Common in woods and thickets throughout the state. 



AcERACE^. — Maple Family. 



Acer saccharinum, L. Silver Maple. Soft Maple. 

 Acer dasycarpiim^ Ehrh. 



Extends up the Sioux river to Flandreau and up the 

 Missouri river to the western edge of Union county — the 

 southeastern county. 



Acer saccliaruni, Marsh. Sugar Maple. Rock Maple. 

 Acer sacchariDH^ 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 



