citrullus colocynthis bitter watermelon in makhtesh ramon crater in israel

agriculture apple ardon bed bitter citrullus closeup colocynthis crater cucumber cucurbitaceae desert economic edible environment family flower fruit gap gourd green growing habitat inedible israel laxative leaf looks makhtesh medicinal medicine mitzpe natural nature nekarot not oil perennial plant potential ramon sandy seed sodom stream summer taste toxic traditional uses vine wadi watermelon wild wildflower yellow