OOooh, I'm glad I'm not the only one that happens to! I move plants around so much, I have a lot of those moment. And sometimes I "find" things I forgot I had. I hope yours didn't blow away or get eaten, just misplaced! Maybe it's just shy.
I'd love to find that graveolens too! I haven't shown all of mine yet but that's not one of them. I've never seen one in person.
What's weird is that I haven't seen a "boring old" P. obtusifolia to buy over the past few yrs. Prob just bad timing since I so rarely go where plants are sold.