What plants have you brought home for their foliage that surprised you with unexpected fragrant flowers?
Hostas with white flowers - every one I've sniffed smelled REALLY GOOD! I had about 25 different ones in OH, no purple ones allowed (I know, hard to believe.)
Caladium 'Carolyn Whorton' - it only lasted a few days, and I had to stick my head down between the leaves, but holy cow was I glad I did. I've been sticking my tush in the air if necessary to sniff Caladiums since but have had no other fragrant experiences.
Purple velvet - gynura. Never had one of these stay alive long enough to make flowers and didn't even know it could until getting the newest one. A few months after I got it, it made orange flowers that smelled BAD, as I was told they would when I asked about the forming buds. My son and DH thought it was funny, and nobody could resist a second or even third sniff as the flowers progressed. My son had a great time learning all of the words we could think of for stinky. We all agreed it was hilariously unpleasant up close, but the few flowers on the tiny plant weren't bad enough to require cutting them off. (pictured below.)