1. Duckweed

2. Duckweed (Lemna minor), also known as: duckweed, field duckweed, duckweed, water duckweed, water duckweed, is a kind of duckweed. A water-floating plant of the family Azulaceae. It likes warm climate and humid environment, and avoids severe cold.

3. Floating plants. The leaves are symmetrical, green on the surface, light yellow or greenish white or often purple on the back, nearly round, obovate or obovate elliptical, entire edge, 1.5-5 mm long, 2-3 mm wide, slightly raised above. Or raised along the midline, with 3 unobvious veins, and 1 hanging filamentous root on the back. The root is white, 3-4 cm long, the root crown is blunt, and the root sheath is wingless. There is a sac on the back side of the frond, and new fronds emerge from the sac, are connected to the mother body with a very short thin stalk, and then fall off. The female flower has one curved ovule, the fruit is wingless, nearly gyro-shaped, and the seeds have a protruding endosperm and 12-15 longitudinal ribs. They generally bloom infrequently and reproduce by buds.

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