Aquatic and Wetland Vascular Plants of the Northern Great Plains
60. Lemnaceae, the Duckweed Family
2. Spirodela Schleid. -- Duck-meat1. Spirodela polyrrhiza (L.) Schleid.
Fronds flat, orbicular to obovate, green above, dark red or purple beneath, floating on the surface, 3-6 mm long, usually in clusters of 2-5. Roots mostly 4-9 per frond. Reproductive pouches 2, one on each lateral margin of the frond. Flowers rare, comprised of 2 or 3 stamens (male flowers) and 1 pistil (female flower) in each pouch. Fruit small-winged, 2-seeded. Reproduction mainly by budding of new fronds from the reproductive pouches. Stagnant or slow-moving fresh water; frequent from e and c ND to NE; (Cosmopolitan).
 Spirodela polyrrhiza. |
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