Many wetlands, ponds, lakes, and backyard gardens of southern British Columbia are rimmed with a
beautiful water-loving plant called yellow flag-iris. Seemingly harmless and eye-catching at first
glance, this plant poses a significant threat to surrounding ecosystems. The Yellow Flag Iris is
considered an invasive species in BC as well as much of North America.

Invasive plants grow rapidly and spread quickly, causing damage to the environment, economy and our
health. They are also the second greatest threat to biodiversity after habitat loss, according to the
International Union for Conservation of Nature (IUCN).

This iris forms dense tuberous mats excluding native wetland plants, choking wetlands and drains. It
seeds prolifically and the floating seeds can be dispersed widely by flowing water. ~ Invasive
Species Council of British Columbia

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