Complex sentence: Another category of edible leaves are those used as emergency food like alfalfa, "Ruppia maritima", rice or wheat leaves, and the leaves of cultivated legumes, eaten only in times of famine, or in isolated areas when fishing or hunting fail.
Split into simpler sentences: Another category of edible leaves are those used as emergency food or famine food like alfalfa, "Ruppia maritima", rice or wheat leaves, and the leaves of cultivated legumes. They are eaten only in times of famine, or in isolated areas when fishing or hunting fail.