This photo is from new user @Ixora, via Daniel Mosquin. I hope Ixora will reply to say where these flowers are growing.
Sorry, they are in central Ontario. The are about 2.5 to 3' tall. Tolerates drought. Not sticky. The area is very rocky, so there is only about 6" of soil but they are thriving never the less. They do tend the flop over. ( lack of root depth I guess).