University of Wisconsin-Madison, Wisconsin State Herbarium (WIS)
v0413294WIS
e26d03c8-d470-40a3-b665-d812057568bc
Wolffia punctata Griseb.
Araceae
Landolt, E. (1981)
Det. in dupl.
Dennis, La Rea J.; Smith, Frank H.
2532
1963-06-22
June 22, 1963
United States, Oregon, Lane, Junction City, 1st gravel pit south of town.
44.2194 -123.2044 +-402m.
TRS: T15S R04W sec
Pond.
Lemna minor
Mixed collection: Wolffia punctata [v0413294WIS] (very small fronds, found floating on the surface of the water); Wolffia columbiana [v0413295WIS] (somewhat larger fronds, more submerged[)]. These two species form a thick scum over entire pond.