Northern Prairie Wildlife Research Center
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.
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.
Previous Section -- Lemna minor L.
Return to Family -- Lemnaceae - The
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