Blame this.
Corni
Most people don’t realize that dryads were only one of many species that were, broadly speaking, a magical combination of animal and tree. This is probably not too surprising: not to be indelicate about it, but humans tend to notice right off the bat whether a particular supernatural species can be, ah, interacted with without risk of later social ostracism. The ones that are not tend to fall through the taxonomic cracks.