No interactions present.
... distinguish Chamerion angustifolium from Epilobium hirsutum. Vegetatively the distinguishing feature is the spirally arranged foliage of the former, constrasted with the opposite (at least basally) foliage of the latter.
I often find these difficult to sort out!!...and the flowers actually look like previous Rosebay Willowherb I've seen!! Doh
... I can now distinguish at a glance (some) pairs of species that I couldn't tell apart 5 years ago.
....excellent..so there still hope for me! :-)
Lat/Lng: 54.5, -3.0
OS grid ref: NY3817