wild toxic watermelon growing in the makhtesh ramon in israel

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