Philodendron Billienum is a hybrid between Philodendron Billietiae and Philodendron Pastazanum. Not much is known about this plant yet as it's a newer hybrid to the market but from what I've seen, it has a very prominent white main vein and vibrant green foliage.
I have a few of these available so the one pictured may not be the exact one you receive but they are of similar size and appearance.
