Iochroma said:P. scandens and serpens are not the same (and this is not P. scandens).
You will have to duke it out with the Catalogue of Life, the NGA Bible. Maybe you can show us what/why you think they are different plants?
plantladylin said:Your link to the Catalogue of Life page is for Peperomia dimota which is an accepted species name with a synonym name of Peperomia serpens.
Peperomia serpens is also an accepted species and it has a bunch of synonyms. Confused yet?
Here's the CoL listing for the accepted P. serpens, along with it's long list of synonyms: