Citrullus Colocynthis: In the ouadis or valleys, you can easily find large patches of small pumpkins or watermelons. They are round balls scattered on the ground. Some are fresh, others are dried. You are not allowed to eat them, but they are used for medicinal purposes. For rheumatism, as a laxative, for gonorrhoea, for urinary tract infections, for diabetes... - On the edge of Erg Brousset - Niger - 2000