I've grown it several times, Ionopsis utricularoides that is when I grew the then named equitants. It being a Florida native I wanted to make sure it was in my collection. I gave up. After getting a better grasp on growing tolumnias I should have tried it again.
Anyway...interesting link to view Delicate Ionopsis, Delicate Violet Orchid (Ionopsis utricularoides) Information Page at Florida's Native and Naturalized Orchids