Yes, I have an allergy to Bottlebrush Trees, I have only just discovered this and I am quite shocked about this as I have been blaming my raised very red itchy, inflamed skin on insect bites as the beginning of hives always start with spots like bites. I put the Bottlebrush to the test by deliberately rubbing a flower against the inside of my forearm to test if there is a reaction and sure enough next morning I had very itchy, red, inflamed hives!