Equisetum 



Equisetaceae 



61 



Map 44 

 Equisetum trachyodon A Br. 



Equisetum vanegatum Schleich 



~~ 55 



Map 46 



Equisetum Nelsoni (Eaton) Schaffner 



where it had almost covered a sandy fallow field in the valley of Pigeon 

 River. The plant is extremely variable and many varieties have been 

 named, several of which have been reported from Indiana. According to 

 Schaffner these variations are all ecological and not worth recognition. 

 Newf. to Alaska, southw. to N. C. and Calif. ; also in Eurasia. 



2. Equisetum trachyodon A. Br. (Equisetum vanegatum var. Jesupi 

 A. A. Eaton). Rough-toothed Scouring-rush. Map 44. My only speci- 

 mens are from Pokagon State Park from the wet, sandy shore of the east 

 side of Lake James and from the east side of Crooked Lake, Noble County. 



Que. and Ont., southw. to Conn, and 111. ; also in Eurasia. 



3. Equisetum variegatum Schleich. Variegated Scouring-rush. Map 

 45. My only specimen is from the grassy border of a dried-up slough in 

 the dunes about a quarter of a mile south of Pine, Lake County (now along 

 Clark Street in Gary about a quarter of a mile south of Lake Michigan). 

 It has been reported also from Porter and La Porte Counties. This 



So 



Map 49 



Equisetum kansanum Schaffner 



