Xanthium strumarium var. strumarium

3ooS
HERBARIUM OF
THE UNIVERSITY OF WISCONSIN-LA CROSSE
La Crosse, Wisconsin
Plants of Dredge Spoil Sites
Xanthium strumarium L.
(Compositae)
Wisconsin, LaCrosse Co.; Island 18; Mississippi River-
mile #693.3; T15N R7W Sec 29
Age of dredge material-15 yr; Approx. elevation-636 ft,
Normal Pool elevation-631 ft. Island on E side of main
channel; specimen growing on spit of dredge material
bordering slough, north end of island Ht of specimen-0.5 m
NEW YORK BOTANICAL GARDEN
Coll:
03202059
S.R. Ziegler
D.F. Sefton
No- 3003	28	Sept	1975
Mississippi River-Navigation Pool 8
N Mile 691-702.5
03202059