Plant: small aquatic plant Leaves: FRONDS floating on the water's surface or (rarely) submerged, single or mostly a few cohering in groups, ovate to obovate, 1-5mm long, 1.3-3 times as long as wide, flat and thin, without a green stalk but with a very small white stipe that often decays; margins entire; nerve 1, mostly prominent, longer than the extension of the air spaces or running through at least 3/4 of the distance between the attaching point of the root and the apex; papillae small, present or absent along the midline; anthocyanin absent; air spaces much smaller than 0.3 mm Flowers: very rare, 1-ovulate, the small utricular scale open on one side Fruit: 1.0-1.35 mm long, not winged. Seeds: with 15-29 ribs Misc: Mesotrophic, quiet waters; below 1800 m (6000 ft); May-Jul Notes: root up to 1.5 cm long, the sheath unwinged, the tip rounded to somewhat pointed; no distinct turions present REFERENCES: Landolt, Elias. 1992. Lemnaceae. Ariz.-Nev. Acad. Sci. 26(1)2.