Wolffia punctata Griseb.

*
7~t
. *
•1 *
i- '
Hr ? ;
/•. &
r-:f A*\
?w « ¿f V
V* Z*Tptym .
r -
*
' C V
v"***
PLANTS OF OREGON
MIXED COLLECTION
Wolffia punctata Oriseb. (very small
fronds, found floating on the sur-
face of the water) - * •
Wolffla columbiana Karsten (some-
what largrer fronds, more submerged)
These two species form a thick scum
over entire pond.
Assoc. species: Lemna minor
LANE CO.: Junction City, 1st travel
pit south of t$«n. R. UW., T.15£,
June 22, 1963
La Rea J. Dennis (#2532)
with Dr. Frank H. Smith
Exchange from the Herbarium of
Oregon State University
Duplicate determined by E. Landolt
03700917