16 



THE FERN BULLETIN 



forms riparium, campestre, medium, decumbens and 

 nemorosum are common throughout with the type. 



Equisetum telmateia (Ehrh.) In cold alder 

 thickets, Keweenaw Co. Rare. 0. A. Farwell 



Equisetum pratense (Ehrh.) Thicket horsetail. 

 Not yet noticed in St. Clair Co. Macomb Co.; 

 Genesee Co. ; Emmet Co. in Lower Peninsula. Ke- 

 weenaw Co., Upper Peninsula, O. A. Farwell. 



Equisetum sylvaticum (L.) W ood horsetail. Very 

 common in St. Clair Co.; Washtenaw Co., rare; 

 Clinton Co. ; Montcalm Co. ; Genesee Co., frequent 

 north and west throughout the State. 



Equisetum palustre (L.) Marsh horsetail. Said 

 to be about Lake Huron and in the Upper Peninsula. 



Equisetum littorale (Kuhlewein.) Shore horse- 

 tail. Near New Buffalo, Berrien Co. ; Iosco Co., in 

 Lower Peninsula. Keweenaw Co. in Upper Penin- 

 sula, 0. A. Farwell. 



Equisetum fluviatile (L.) Swamp horsetail. Pipes. 

 In muddy places and shallow water throughout the 

 State. The forms polystachum and limosum are re- 

 ported with the type. 



Equisetum laevigatum (A. Br.) Smooth scouring 

 rush. This species apparently very doubtful. Re- 

 ported from Manistee Co. by H. P. Daniels. Speci- 

 mens collected in St. Clair Co., Michigan and 

 Lambton Co., Ontario by the writer, at first receiv- 

 ing this name by the late Prof. C. F. Wheeler and 

 the late A. A. Eaton, were afterward named E. 

 hyemale intermedium A. A. Eaton and so distributed 

 to fern students and the herbariums of the United 

 States. It was said that E. laevigatum would 

 probably not be found in this state, but that it was 

 abundant farther west. 



