I think it will be difficult to track down which one it is, Miconia calvescens is very similar except I don't think yours has purple leaf backs and are not as dark a green.
http://calphotos.berkeley.edu/...
http://www.invasive.org/weedcd...
It says on this site there's more than a thousand Miconia species!
http://bosque-santa.blogspot.c...
I think Miconia sp. is good!