Wild passion flower (Passiflora foetida) native to the southwestern USA. The bees loved these flowers. The vine grows in my greenhouse and the flowers open in early morning and close late morning to mid day depending on how much sunlight they get. - Wild passion flower (Passiflora foetida) native to the southwestern USA. The bees loved these flowers. The vine grows in my greenhouse and the flowers open in early morning and close late morning to mid day depending on how much sunlight they get.