OMG, this category is huge in my yard. I moved into a house with lots of oldies growing that are still not all identified. I started collecting in 1996 or thereabouts and bought whatever looked pretty and was affordable so have ended up with tons of historic plants. I really didn't start planting anything modern until three years ago…of course, I did go quite crazy with trying to catch up but I haven't deleted a single oldie… out of over 900 Daylilies in my yard, I'm sure at least 500 are pre 1990.