Cistus skanbergii.......normally a nice sturdy mound.....and I think that it is known as such.....
I'm happy to have found that it also likes to climb up through the branches of Ceanothus 'Dark Star' when planted close for support...it may also help that the Cistus side is a bit shaded making it want to climb for more sun...the Cistus has climbed to 6' with the support of the Ceanothus