Native or Introduced:
Nutrient Removal Rating:
High (cleanse and polish)
Rooted or Floating:
Maximum Water Depth:
Red stemmed thalia can be as tall as 10.5 feet. Leaves are basal with green or red-purple sheaths. Petioles are green to red-purple and smooth.
Blades are oval to narrow elliptical and measure 8-24 inches by 2-10 inches. Blades are green and have rounded bases and pointed tips. Inflorescences open and spread widely. Flowers are lavender to purple in color. Flowers yield elliptical fruits that contain brown/black smooth seeds.
Flowering occurs from summer to fall with fruits developing summer to winter. Red stemmed thalia inhabits ponds, ditches, swamps, marshes, streams, and lakes. It can be emergent or grow along the banks.