I was just about to make this change but see you've set it up, Nick. Any reason not to commit it? ITIS agrees, by the way.

I'll proceed with adding subspecific names under O. cespitosa and merging the O. caespitosa subspecific names with them. (I initially considered simply dropping them, but will keep for historical purposes - and so they can't be added back.)

I'm just trigger-shy with making plant changes because I don't have a botany background. I had forgotten about this one!