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

1. Lemna L. -- Duckweed

4. Lemna minuscula Herter


Fronds oblong to elliptic or somewhat ovoid, 1-2.5 mm long, symmetric or slightly asymmetric at the base, pale green, obscurely 1-nerved (the nerve often nearly obsolete), thin, with only 1 layer of air spaces, hyaline around the margin, flat to slightly convex on both surfaces, sometimes with a few low papillae on the upper surface. Turions not produced. Root sheath not winged; root tip pointed. Fruit not winged, 1-seeded. Rare, w NE Sandhills; (w U.S. and S.Amer.; intro. in Europe). L. minima Phil., L. minuta H.B.K.

This species is sometimes included in L. valdiviana Phil., a primarily coastal entity that has been recorded no closer to us than e KS. L. valdiviana differs in having longer, more prominently 1-nerved fronds which are strongly asymmetric at the base.

GIF- Distribution Map

Map key


Previous Section -- Lemna minor L.
Return to Family -- Lemnaceae - The Duckweed Family
Next Section -- Lemna obscura (Austin) Daubs

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/plants/vascplnt/species/lminu.htm
Page Contact Information: Webmaster
Page Last Modified: Saturday, 02-Feb-2013 06:44:20 EST
Sioux Falls, SD [sdww54]