Aquatic and Wetland Vascular Plants of the Northern Great Plains
60. Lemnaceae, the Duckweed Family
1. Lemna L. -- Duckweed8. Lemna turionifera Landolt
Very similar to L. minor and often difficult to distinguish from it, differing mainly as follows: Fronds often somewhat asymmetric and falcate, broadest toward the apex, often red-tinged beneath and sometimes red-mottled above; upper surface with several papillae of about equal size above the midline, these sometimes obscure. Turions produced under unfavorable conditions, appearing as small, obovate to orbicular, thick-textured fronds that lack roots, dark green (often strongly reddened) to brown, eventually breaking free of the parent frond and sinking to the bottom. Very common; (c and w N.Amer., c and e Asia).
 Lemna turionifera. |
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