Bert, sorry it took me a while to answer your question reference C. Reginae (C. forbesii x C. purpurata). This hybrid is dated 1897 and the OrchidWiz picture shows similar form but lighter color. It also lists C. reginae, a species of the same name dated 2008 and both form and color (much lighter) differ from Glen's photo. I think Glen's flower is the best of all of the photos I have seen. If this is a natural hybrid, shouldn't there be an X between the Genus name and the species? Kind of strange isn't it?
Jim