PTERIDOPHYTES OF NORTHWESTERN ONTARIO 47 
EQUISETALES 
15. Equisetum ARvENSE L. Mostly on sandy shores 
or sandy glacial terraces: Rossport; Nipigon; Longuelac, 
north end of Long Lake; Fluor Island and Magnet Point, 
Lake Superior; Stanley. 
15a. EquiseTuM ARVENSE var. CAMPESTRE Schultz. 
On gravelly island at lower end of rapids, Nipigon, and 
(fine fruiting specimens) on sand-gravel railroad em- 
bankment, C. N. R., east of Longuelac, north end of 
Long Lake. 
156. Equiserum aARVENSE var. pirrusuM A. A. Eaton. 
Sandy strand, Orient Bay, and along trail, Ombabika 
Post, Lake N ipigon; wet sawdust along shore of lake at 
unt, C. G. Ry. 
When our material was gotten together it became ap- 
Parent that the more typical arvense was represented 
only from the Lake Superior and Long Lake collections 
while, to the northwest, around Lake Nipigon and west 
of there, only the varieties were represented. Although 
Tecan not state definitely, I do not believe that the typical 
“vense occurs, at least commonly, in the latter dis- 
Mets, or it would have been collected. 
16. Equisrrum PRATENSE Ehrh. With a general 
‘ange from Nova Scotia and Quebec to Alaska and south 
to the northern U. S., this is reported for the shores of 
ake Nipigon and Lake Superior by Macoun, and our 
collections include it from mixed woods on glacial till at 
°nguelac, north end of Long Lake. Certainly not 
“emmon in western Ontario. 
17. Equiserum syLvaticum L. Restricting this name 
0 the plants with shorter and more recurved branches, 
at Specimens are from: Heron Bay; Pay’s Plat; Jack- 
fish: Porphyry Island; Longuelac; Stanley; and satan 
Mostly in spruce-sphagnum bogs, but on old sand dunes 
at Stanley, 
