• Flower: White rounded cluster
• Leaves: basal, linear, 2 feet long, ¼ inch wide, hairless, toothless, flat, thin
• Fruit/Seed: ½ inch diameter, plump, spiky head, matures from light green to dark greenish or brownish
• Height: 4-24 inches
• Flowering: July - September
• Habitat: lakes, ponds, creeks, floating mats, marshes, drainage ditches