ia AMERICAN FERN JOURNAL 
In wet places and on river, creek, and lake banks. 
Europe, Northern Asia, Japan, and Alaska; in N. Am. 
south to central Cal. and western Mont. 
4. EQUISETUM VARIEGATUM Schleich. Cat. Pl. Helvet. 
27. 1807. Variegated Scouring-rush. 
E. trachyodon A. Br. Hippochaete nelsoni (A. A. Eat.) 
Farw. 
Type locality: Switzerland. 
In wet meadows, bogs, and alluvial thickets, especially 
in sandy places. 
Circumpolar, north temperate zone and extending 
into the Arctic zone to beyond 80° N. lat.; Europe, 
through northern Asia, Alaska, Labrador, and Green- 
‘land; in N. Am. south to Conn., Ohio, Ill., Neb., Colo., 
and Ore. 
5. Equiserum scrrpoweEs Mx. FI. Bor. Am. 2: 281. 1803. 
Dwarf Scouring-rush. 
Type locality: “Hab in vetustis sylvis Canadae.’’ 
In low fields, swamps, and moist coniferous woods. 
Circumpolar, north temperate zone, extending be- 
yond the Arctic circle; Europe, northern Asia, and Alaska 
to Greenland; in N. Am. south to Conn., Penn., Mich., 
Ill., Mont., and Wash. 
6. EquiseTuM KANSANUM Schaffn. Ohio Nat. 13: 21. 
1912. Kansas Scouring-rush. 
E. laevigatum according to A. A. Eaton, not A. Braun. 
Pall cus locality: “Bloom township, Clay County, 
an 
rR growing in clay soil on banks of ravines 
and on bluffs 
Mainly in he western Mississippi basin; Ohio to 
Mont. and B. C., south to Cal. , Ariz., N. Mex., and Mo. 
. Equiserum runstonr A. A. Eat. Fern Bull. 11: 10. 
1903. Funston’s Scouring-rush. 
E. mexicanum of authors, not Milde. 
