82 GEOLOGICAL REPORT. 



RAT AN. 



Ratan ( Wistaria frutescens) . 



ROSE. 



Prairie Rose (Rosa setigera). Prairies and open forests. 

 Several other species were observed, as R. blanda and R. lucida. 



RASPBERRY. 



Red Raspberry (Rubus strigosus). On borders of fields and 

 forests. 



Black Raspberry or Thimbleberry (Rubus occidental-is). In 

 open forests and beside roads and fields. 



SYCAMORE. 



Buttomvood or American Plane Tree (Platanus ocddentalis). 

 In the bottoms of all the principal streams. 



SUMACH. 



Dwarf Sumach (Rhus copallina). Common by the borders 

 of fields, roads and prairies. 



Smooth Sumach (Rhus glabra). Road sides and open forests. 



Stag-horn Sumach (Rhus typhina). Often in clusters in 

 prairies. 



Poison Ivy or Poison Oak (Rhus toxicode-ndron) . On rich 

 soils, large and abundant. 



Fragrant Sumach (Rhus aromatica). Abundant in forests 

 and by roads and fields. 



SPIRAEA. 



Flowering Spircea, Nine-bark or Seven-bark {Spircea ojmli- 

 folia L.). On limestone bluffs, bordering streams. 



Spircea cori/mbosa. On dry prairies and ridges. 



SASSAFRAS. 



Sassafras (Laurus Sassafras). On medium soil ; not common. 



SARSAPARILLA. 



Sarsaparilla. Near streams, on rich soil. 



SERVICE-BERRY. 



Wild Service-Berry or Shad-bush (Amelanchier Canadensis). 

 On bluffs and in forests. Common on most streams, most abun 

 dant on Pommc de Torre and Swan creek. 



STAFF-TREE. 



Staff-Tree (Celastrus scandens). On river banks and broken 

 bluffs. 



