Plant: small aquatic plant Leaves: FRONDS floating on the water's surface, single or 2 to a few cohering in small groups, obovate, 1-4 mm long, 1-1.5 times as long as wide, flat, scarcely gibbous, without a green stalk but with a very small white stipe that often decays; margins entire; nerves 3, the greatest distance between the laterals near or above the middle; papillae distinct on midline, the apical papilla not larger than the others); upper surface (especially near the apex) sometimes with red spots; lower surface often red colored, the red coloring beginning at attachment point of the root; largest air spaces up to 0.3 mm long Flowers: occasional, 1-ovulate, the small utricular scale with a narrow opening at the top Fruit: 0.5-0.6 mm long, not winged. Seeds: with 30-60 indistinct ribs Misc: Mesotrophic to eutrophic, quiet waters; 1500-2700 m (5000-9000 ft); Jun-Aug Notes: root up to 15 cm long, the sheath unwinged, the tip mostly rounded; turions sometimes present, small, rootless, olive to brown REFERENCES: Landolt, Elias. 1992. Lemnaceae. Ariz.-Nev. Acad. Sci. 26(1)2.