English: Spotless watermeal; Rootless duckweed.
Thai: Khai-nam, eeaming eggs of the water.
Region: Europe, Africa, Asia.
Habitat: quiet water bodies, ponds.
Content: 40% protein by dry weight and its turion is about 40% starch; many amino acids, calcium, magnesium, zinc; vitamin B12.
Use: nutritious food for animals, fish and chickens; prolific in reproduction, doubling its population in 4 days; for absorbing and metabolizing pollutants; take up large amounts of nitrogen and phosphorus from the water.
Botanyherb; aquatic; smallest vascular plant; multiplies by vegetative reproduction; dormant, sinking to the bottum to overwinter as a turion, in cool conditions.
Leaves: 1 mm wide, with a flat top that floats at the water's surface, with few parallel rows of stomata; root absent.
Flower: minute; one stamen; one pistil; ; mixotroph, or energy by photosynthesis or by absorbing dissolved carbon.