Water chestnut (Trapa natans)
Photo credit: © Thomas Palmer/Flickr

Variable-Leaf Milfoil

(Myriophyllum heterophyllum)

Report this Species!

If you believe you have found this species in its invasive range in Pennsylvania, please report your findings to iMapInvasives by submitting an observation record.

Species at a Glance

Learn more about Variable-leaf milfoil and its impacts by viewing information available in our Gallery of Invaders.

Range Information

The map below depicts both the native and invasive ranges of variable-leaf milfoil in Pennsylvania, displayed using a HUC 12 watershed layer.

*Note that Erie and Fayette counties contain both native and invasive populations of this species (hence why they appear as both blue and pink on the map).

Data used to create this map was provided by the Pennsylvania Natural Heritage Program and Pennsylvania's Field Guide to Aquatic Invasive Species (2015).

Native range

Invasive range

Contains both native and invasive populations (Erie & Fayette counties)

Pennsylvania iMapInvasives, invasive here but not there, Variable-leaf milfoil, Myriophyllum heterophyllum