Description
• Free-floating perennial aquatic resembling an open head of lettuce or cabbage
• Leaves ribbed, spongy and velvet to the touch
• Flowers are very small and hidden in the leaf bases
• Roots unbranched and feathery up to 80cm long
Flowering Times
• Throughout the year
Control Measure
• Prevention is the best method
• Mechanical or hand removal of small areas
• Herbicides
Problems
• Encourages mosquito breeding
• Interferes with irrigation and recreational activities
• Spreads rapidly by daughter plants growing at the end of stolons and by seed
