Ambrosia trifida L.

The New York

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HERBARIUM OF
THE UNIVERSITY OF WISCONSIN-LA CROSSE
La Crosse, Wisconsin
Plants of Dredge Spoil Sites

Ambrosia fri fida L.

(Compositae)

BOTANICAL

Garde**

Wisconsin, Vernon Co.; Island 2; Mississippi River-
irle #685.1; T14N R7W Sec 32

Age of dredge material-12 yr; Approx. elevation-633 ft,

Normal Pool elevation-631 ft. Small island E side of

main channel; surrounding border of Salix, Populus, Acer,

UJnus; specimen growing in weedy area, center of island;

slight depression running E-W divides this site in two
Ht of specimen-2 m

Coll: S.R. Ziegler	No. 2563 Date: 12 Sept 1975

M.F. Leykom

01884388