Willow -Salix sp.
Large shrubs or trees with alternate lance-like leaves. Leaves may be toothed at the margin. Small inconspicuous white flowers adorn the tree in mid to late spring. Willows grow on pond banks and provide shade for anglers. However, willow roots can penetrate pond dams and create serious leaks. Remove trees 2 inches in diameter or smaller from the pond dam. It is best to leave larger willows because removal will certainly leave roots that will die and may cause leaks. Willows and other trees also remove large volumes of water from the pond through their leaves in a process called transpiration (see fact sheet titled "Conserving Water in Ponds").