There is some research suggesting that at least a few of the Trigonipedia Cypripedium (Chinese spotted leaf Cyp) species are pollinated by flies attracted to decay-
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3088628/I have noticed that Bluebottles and other flies seem attracted to the leaves and flowers of
Cypripedium lichiangense. Whilst I find the flower attractive from a distance, close-up the flower surface resembles decaying mammal flesh. I was however surprised to find that some flies were laying their eggs on the flower (but not the leaves). These orchids are very prone to rot and so I was horrified to find a carrion fly orgy on my
lichiangense -the fly eggs can be clearly seen on this image:
