Khai Nam

Wolffia globosa

Physical Characteristics

Wolffia globosa is an evergreen Perennial at a fast rate. See above for USDA hardiness. It is hardy to UK zone 10. The plant is self-fertile. It is noted for attracting wildlife. It cannot grow in the shade. It prefers wet soil and can grow in water.

Distribution

Tropical areas of Africa and Asia, widely naturalised in other warm regions of the world.

Habitats

Edible Uses

Edible Parts: Leaves Edible Uses: Leaves - cooked. An excellent flavour, they taste somewhat like a sweet cabbage[183 ]. The leaves are very nutritious, containing about 20% protein, 44% carbohydrate. 5% fat and are rich in vitamins A, B2, B6, C and nicotinic acid[183 ].

Medicinal Uses

Vitamin C None known

Known Hazards

Although no specific mention has been seen for this species, it belongs to a family where most of the members contain calcium oxalate crystals. This substance is toxic fresh and, if eaten, makes the mouth, tongue and throat feel as if hundreds of small needles are digging in to them. However, calcium oxalate is easily broken down either by thoroughly cooking the plant or by fully drying it and, in either of these states, it is safe to eat the plant. People with a tendency to rheumatism, arthritis, gout, kidney stones and hyperacidity should take especial caution if including this plant in their diet[238 ].