Thanks for the info, Larry, and the links, Moonhowl. I had no idea there were so many, or such tiny ones!
And somehow from those links and the wonder of the internet, I ended up at my own local botanical garden's website
http://norfolkbotanicalgarden....
We have Crepe Myrtles all over the city, and now I know why! Turns out that Fred Heutte, who helped found the botanical garden, was a big fan of Crepe Myrtles and panted them along many streets... maybe even mine! I've been meaning to pay the garden a visit for years now... maybe this summer when they're in bloom.