Two pink/purple non-native invasive plants have been blooming around Harpswell for about a week or more and are particularly visible along wet roadside edges—purple loosestrife (Lythrum salicaria) and Himalayan balsam or touch-me-not (Impatiens glandulifera). Purple loosestrife (1st photo) has taken over many of the freshwater wetlands and wet meadows in more southern areas of New England essentially crowding out nearly all of the native plants. In Harpswell, it is not so widespread and so it seems like we could still have a chance to control it.
As for the second invasive I mentioned, the Himalayan touch-me-not (2nd photo), in my opinion over the last 5 years it seems to have gone from rare to frequent sightings in Harpswell. I’m curious if others agree. Be sure not to confuse the pink Himalayan touch-me-not with the orange native touch-me-not, also called jewelweed (3rd photo). The orange native jewelweed (Impatiens capensis) inhabits the same swamps, lake shores, wet meadows, road ditches or other areas with moist soils. The Himalayan touch-me-not has pink flowers, opposite or whorled leaves (i.e., leaves that originate from the same node on the stem) and can reach up to 6 feet tall, while the native jewelweed has orange flowers, smaller leaves that occur alternately along the stem, and the overall size of the plant is smaller—usually no more than 4 feet.
(Submitted by Lynn Knight. August 9, 2023)
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