Adlumia fungosa
Names: Fumaria fungosa; after Major John Adlum.
English: Climbing fumitory; Mountain fringe; Allegheny vine.
Dutch: Dubbelhoed.
Botany: biennial climber; North America; mountainous regions; white or purplish flowers, which hang in clusters, appear in June to October; long corolla remains closed for some time, after which it tentatively opens at the outer edges; corolla does not fall off but expands like a sponge.
Content: citric acid and various alkaloids.