Possibly tenerife tree mallow Navaea phoenicea although the colour seems to be wrong. Had to grab hold of it as it was blowing about in a gale.
No interactions present.
There are 3 native species (2 endemic) and 2 introduced species http://www.malvaceae.info/Genera/Lavatera/Navaea.html
Thanks, the leaves do indeed look very acerifolia!
Lat/Lng: 28.365307777778, -16.883165277778