USGS - science for a changing world

Northern Prairie Wildlife Research Center

  Home About NPWRC Our Science Staff Employment Contacts Common Questions About the Site

Aquatic and Wetland Vascular Plants of the Northern Great Plains

60. Lemnaceae, the Duckweed Family

3. Wolffia Horkel -- Water-meal

2. Wolffia columbiana Karst.

Fronds orbicular to broadly ovoid when viewed from above, 0.7-1.4 mm long, with a small, flattened upper surface, otherwise nearly globose or ovoid when viewed from the side, not raised and pointed at the apex, green throughout and not brown-punctate. Calm, fresh water; extreme e ND, s SD and NE; (ME to Ont. and ND, s through the e and c U.S. and into Mex. and n S.Amer.; also CA).
GIF- Distribution Map

Map key

Previous Section -- Wolffia borealis (Engelm.) Landolt
Return to Family -- Lemnaceae - The Duckweed Family

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Webmaster
Page Last Modified: Saturday, 02-Feb-2013 06:48:19 EST
Sioux Falls, SD [sdww54]