Wolffia columbiana H.Karst.

No botanical uses.

1
<3?
PLANTS OF OREGON
WOLFFIA COLUMBIANA Karsten
Forming a green scum on the sur-
face of the water.
Assoc, species: Lemna minor.
Azolla filiculoides, Nuphar poly-
sepalum and Brasenia schreberi.
LINN CO.: Old Corvallis-Albany
Road; R. 4 W., T. 11 S., Sec. 2B.
xi/14/1962
Coll.: La Rea J. Dennis (251?)
Exchange from the Herbarium of
Oregon State University
03700851