University of Wisconsin-Stevens Point, Robert W. Freckmann Herbarium (UWSP)
UWSP149556
9a8c2509-f898-4243-b3fe-b6553c6d8b39
Spirodela polyrrhiza (L.) Schleid.
Araceae
Berg, Matthew S.
2008-350
2008-08-03
United States, Wisconsin, Barron, Horseshoe Lake. Polk/Barron Counties [Barron Co. from Lat./Long.]
45.45116 -92.15524
45.45116° N, 92.15524° W; T34N R14W sec07
Located floating or just under the surface in sheltered areas. Common assoc.: (Brasenia schreberi) watershield, (Nymphaea odorata) white water lily, (Nuphar variegata) spatterdock, (Pontederia cordata) pickerelweed, (Lemna minor) small duckweed,
(Ceratophyllum demersum) coontail, (Utricularia gibba) creeping bladderwort, (Utricularia vulgaris) common bladderwort, (Potamogeton..[rest of label cut off].
Restricted to north-central bay and "Mud Lake". Uncommon, scattered individuals occur interspersed between the lilypads.