Lemna tenera Kurz

Submerged aquatic, only floating at the surface when flowering. Fronds solitary or connected in groups of 2, seldom 3, slightly or strongly asymmetric, often curved; oblong to linear-lanceolate; 3-7.8 by 1-2.3 mm; frond when floating slightly convex; base slightly to strongly asymmetric, attenuate; apex symmetric, acute; margin entire; dorsal side smooth or with an indistinct apical papilla; ventral side flat, or convex when floating; green without red pigment; nerves 3, sometimes indistinct. Stipe short, hyaline, sometimes persistent. Root 1, slender, very long; root sheath absent or most indistinct; root cap strongly curved, sometimes straight, acute. Slit of budding pouch just dorsal to the margin of the frond. Fruit unknown.

In ditches and ponds, in rice-lands often together with L. perpusilla, at low altitude, in swamp forest (KURZ), rare.