I bought this plant at the Philadelphia Flower Show, and just now noticed that the underside of the leaves all have these white "bumps" near the veins. I don't know quite how to explain it. (I posted this to Houseplants but didn't realize this forum existed - hi guys!)

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Nothing moves when I swab it. It's not a "pod" if you will, more like little hairs. Is this normal? I would hate to have to battle bugs on this - no leaves look damaged and the plant wants to bloom. Help me, please!