Formerly Tabebuia impetiginosa , now Handroanthus impetiginosus, aka Lavender Trumpet Tree, (Lavender?!?) aka Pink Ipê. Tree of several names. For a few weeks in late winter, breathtaking.
In leaf, or in winter leafless--I can't say I ever notice them. Slow growing, open habit. They do well as street trees surrounded by concrete, because they like warmth.
Native to a wide range--from northern Mexico to northern Argentina. Hardy to about 20-25F (-6 C to -4 C). It is a source of Ipê wood, a very hard, weather resistant wood that recently became popular for use as decking and fencing. Unfortunately the popularity of this wood has contributed to deforestation in the Brazilian Amazon.
In Southern California they grow to about 25'; in their native range, eventually to 50'.
There's also a species with intensely yellow flowers, H. chrysotrichus.
Quite a show of pink. A substitute for flowering Cherry in our climate, which is difficult for a flowering Cherry. I intend to remember to see what they look like out of flower.