It's S. greggii 'Teresa'.

Here is a link that might be useful: 'Teresa'

ncgardengirl:
This is most likely "Teresa" here in Texas there are actually two forms of this plant.While Teresa is supposed to
be from a red form another called 'Armands Blush' is from
a pink sport. I have both.One cannot tell them apart. Just wanted to give you some history behind this plant. Teresa will be the one you will find available on the web.
Art