- Perennial, forming dense stands of robust plants.
- Non-native member of the Iris family (Iridaceae).
- Best Identifying characteristic (when in bloom) is the very showy yellow iris flowers.
- Grows in water up to 25cm deep, or very near water.
- Is tolerant of drought – “excavated rhizomes continue growing after three months without water” (Sutherland 1990).
How It Got Here:
- Brought to Canada and the U.S. as an ornamental plant in the early 1900’s.
- It was also used as an erosion control plant.
Reasons for Concern:
- Is a fast growing/spreading invasive plant that can out compete other wetland plants
- Forms almost impenetrable thickets, similar to the way cat-tails do.
- Individual plants produce from several dozen to several hundred rooted rosettes and flowering shoots connected by durable rhizomes.