I've seen tanks with different plants on driftwood. For example, some people attach anubias and then a type of moss. If it's a large piece, I think you would definitely be fine with multiple species, especially if you fertilize at all. I have four different species in my 5 gal, so, as I'm still cycling, I use fert.
I use fertilizer as well, I have two java ferns attacked to either end of the log and a third one growing in a separate tank since it's just a baby yet. I was thinking about getting some more plants as well like Amazon Sword, Whisteria, and Anubias. Also some more mossy/grassy plant.