Wetland plants of High Park

Aquatic plants, called macrophytes, provide numerous ecosystem services including but not limited to improving water quality, providing habitat, food source (seeds, roots, rhizomes, vegetative growth) for birds and other local fauna, nectar source for pollinators and nutrient cycling.

Wetland Plants at Grenadier Pond. Photo: David Stoneleigh
Wetland Plants at Grenadier Pond. Photo: David Stoneleigh

Macrophytes play an important role in protecting edges and shorelines from erosion as root systems effectively anchor the soil in place while the vegetative growth intercepts energy form waves and currents that would otherwise destabilize shorelines and stream banks. They are highly valuable in wetlands, supplying cover for fish, a substrate for aquatic invertebrates and producing oxygen through photosynthesis.

At High Park, several notable wetland plant species are present including Sweetflag (Acorus calamus), Broad-leaved cattail (Typha latifolia), Common arrowhead (Sagittaria latifolia) and Blue-Flag iris (Iris versicolor). Macrophytes are classified as emergent, submergent or floating.

Cattails. Photo: Karen Yukich
Cattails. Photo: Karen Yukich

For healthy macrophyte populations, High Park users should try to avoid disturbance to the Pond’s edges such as trampling, thereby compacting soils and encouraging colonization of the invasive Phragmites (Phragmites australis).

More plants of High Park's wetlands

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What's New?

TRCA’s 2019 Terrestrial Biological Inventory of High Park

Presentation Link and Follow-Up Q&As now available! Learn about the Toronto & Region Conservation Authority’s methodology, findings and observations as presented in the final High Park Terrestrial Biological Inventory Report, 2019. A question and answer opportunity followed the presentation. Urban…








Trees + Shrubs



Wetland Plants

Invasive Plants