Hi, Ursula. Paul might never see your thread here. Go to one of his questionable photos, enlarge it, and scroll down to "Post a comment about this photo." When you do that, your comment will create a thread in the Plant Photos Forum and the system will automatically notify Paul that his photo is the subject of a thread.
I'm not sure his photos are of any Tropaeolum at all. The plant looks more like a Cuphea.