Japanese Knotweed
Polygonum cuspidatum
All Photos (c) P. Burn

Flower Color: White

Flowering Months: August, September

Leaf Arrangement: Alternate

Vine: no

Description: There is a large patch of this invasive alien opposite the airport, and I've seen it on Plum Island among the cottages, but never on the Refuge proper. This species is also sometimes referred to as Fallopia or Reynoutria japonica.

Credits: (c) P. Burn