Fernando Rivadavia sent me this photo of U. hintonii from Tejupilco, Mexico. It is the only photo of this plant that I have seen.
Fernando also sent me a bunch of photos of other rare CPs, which can be found at
http://www.humboldt.edu/~rrz7001/Rivadavia/
Fernando also sent me a bunch of photos of other rare CPs, which can be found at
http://www.humboldt.edu/~rrz7001/Rivadavia/