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Cornus seemed like the consensus among the various sources that I checked (except GoBotany). Weakley states (for Cornus), "The generic limits are controversial. Phylogenetic analyses show that Cornus is monophyletic, but various clades within it are also monophyletic and have levels of genetic and morphologic divergence often regarded as warranting generic distinction. Zhang et al. (2008) estimate the time of divergences of the various subgenera as having been from the Paleocene to the Oligocene."
He sticks to Cornus though.
In Vermont we also don't use Swida. I know this is a sticky one but I agree with using Cornus.