These are images of flowers from Jan Basteimeijer's Crypts Pages. Below that is a list of all Crypts with links to local resource here, were we simply aggregate photos of species to get some idea of whats what and what's around.
Most crypt questions are of the form "can you ID this?" and sometimes it's possible. We used to say you can't really ID them without a flower but now DNA evidence has shown the within the C. cordata group, for example, flowers of two plants can look identical yet one plant may have 4 times as many chromosomes as the other and isn't the same species despite the identical inflorescence.
But, most cases aren't that difficult and usually we can ID most things. However this is further complicated by the recent discovery that many Crypt "species" in the wild are in fact naturally occurring hybrids and suspicion runs high that there are many more of these which will become apparent once the Herculean task of sequencing hundreds of DNA samples has been done; work is ongoing.