Originally posted by WPRESTO
Five will get you ten or more that it has something to do with DNA. We have three species of Rana here in MessyChewBits that come out in sequence singing in the ponds - - first R sylvaticus, then R clamitans, and then good old deep-throated R. catesbeianus. Now they've all become Lithobates, poor things. But still their calls can be heard in the same sequence every early Spring, late Spring, then Summer.
Indeed, I did think about DNA evidence, lots of DNA research going on in orchid taxonomy, great upheavals in the last 10-15 years with respect to taxonomic changes. It's headache-inducing to try to keep current on it (I'll spare you the gory details), huge reclassifications of species and genera, things that we "knew" are no longer valid, name changes galore. So that's possible, but my recollection of this paph kerfluffle was that it came about before the Great DNA Analysis effort, that the taxonomists promulgating it were basing the conclusions on something else altogether, most likely morphological studies. But, not being a "paph person" myself, I never paid it much attention and made offhand jokes about it ("you know, they aren't even orchids...") to slavering paph addicts. So I don't actually know the origin of the claim, nor the current status of the, er, debate. Maybe I should try to excavate something and inform myself.