I also am looking for Oenothera Triloba seed and cultural instructions. My family had them for at least 60 years in lower Michigan. They reseeded themselves every year. I brought them North to the Sault Ste Marie area in the 70's, but, believe it or not, lost them in a divorce.
I have heard them called Desert Primrose, and believe they are a native of the high desert in the western U. S. We called them "desert Flowers". I don't have much to trade, just starting a new yard, but would be glad to pay for them. Many Thanks.
Dave
