Caper

The caper bush is a spiny shrub of the Mediterranean region, grown for its flower buds, which are pickled as capers, and for its fruit. Wikipedia also calls it the Flinders rose. Cunningham calls it feminine, with Venus and water, and gives potency, lust and love as its powers. He says capers eaten cure impotence and that the plant is used in love and lust formulae. His folk names are Fakouha, Lasafa and Shafallah. Wikipedia warns that gathering wild capers needs care, because a few similar Capparis species are poisonous. The warning is about identification and is not a caution about capers themselves. Cunningham is the only source for the magical use.