The first thing a serious grower learns to do at a plant fair is ignore the tag. Labels lie, or they're hopeful, or they were written by someone three suppliers up the chain who took a guess. The leaf, however, cannot lie. Hold a young Anthurium up to the window and the venation glows like a circuit diagram — primaries fanning from the petiole, secondaries arching between them, a fine tertiary mesh filling the panels in between. Every species has a signature in there. You just have to learn to see it.
I keep a loupe in my pocket for this. A 10x triplet, the kind geologists use, because the difference between a real Philodendron luxurians and a well-grown gloriosum × luxurians hybrid often comes down to how the tertiary veins behave between the secondaries — whether they run parallel, branch, or break into reticulation. Venation is the most honest part of an aroid leaf. It develops early, it doesn't shift with light stress the way color does, and it's almost impossible to fake.