evening primrose is also called wild evening primrose and field
evening primrose. It is found on prairie hillsides and on
stream and lake edges; it will flourish in dry or damp soils.
The flowers open in the evening and wither the following day;
not all the flowers bloom at once.
American native was introduced in Europe in the early 1600's;
its fleshy taproot was used as a vegetable.
mixed dried leaves with tobacco and smoked it to bring good luck