Dear Friends of Maine Lakes, Thank you for visiting our Interactive Field Guide! Though the primary content pertaining to species identification in this Guide is—for the most part—still correct and useful, the site itself is no longer fully-functional (nor able to be updated). The entire Guide will soon be replaced by a new, expanded website-version of the Maine Field Guide to Aquatic Phenomena. So please stay tuned! Thank you for your patience!

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Leaf Structure: In order to identify an aquatic plant, begin by observing how the leaves are arranged on the stem. Then look carefully at a single leaf. Observe the leaf margins (outside edges) and the overall shape of the leaves. Next observe any additional features, such as flowers, fruits, and root structures.

Leaf Patterns:

Leaf Heterophylly:

Stem and Leaf Structures:

Flower Structure:

Root Structures:

Secchi Disk
Water Quality Monitoring
Invasive Target
Aquatic Invasive Monitoring

Maine Volunteer Lake Monitoring Program
24 Maple Hill Road, Auburn, ME 04210

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