Given that one would be tagged "venus fly trap" and the other would be tagged "cobra lilly" I really suspect they could tell. I don't doubt he had no idea what they were when I first mentioned them, but given that he found them in his list of products, and correctly called them "cobra lillies" throughout our discussion...
I mean is there a reason you want to insult some random store employee? I'm finding it more than a little rude and pointless. I know that Lowe's gets in cobra lillies because somebody here, who definitely knows what they are, bought some at Lowe's, and I really don't think the guy I talked to was so stupid that he couldn't read the words in his own computer system.
If you're trying to make me feel better, you're not. I really dislike people who put down store employees as idiots, just because they're working a minimum wage job. I've worked some of those jobs myself, and I didn't like it when people treated me like I was stupid then, and I still don't like it now.