Curly pondweed

Perennial herbaceous plant 1–3 cm long. Introduced to Québec and invasive. Grows near water and in mountains.

There are 124 observations of Curly pondweed in Québec, mostly in Estrie, Montérégie and Outaouais, and it has been reported in 9 of the 17 regions. They peak in June and July and become rare from September to May.