Smallanthus sonchifolius, known as an earth apple, has sweet, edible storage roots and single yellow flowers.

Description:
Smallanthus sonchifolius is a perennial plant notable for its large, edible storage roots. It is a relative of the sunflower with smaller yellow single flowers. The roots have brown skin similar to that of a potato. The flesh is white and sweet to the taste both raw and cooked and is comparable to that of apple and a pear with the crisp texture of celery. Taste and texture remain somewhat the same whether eaten raw or cooked plus it oxidizes at a very slow rate. Roots are said to be very low in carbohydrates. Easy to grow and resistant to many pests and diseases. Consume fresh like a dessert apple or roast or cook in stir fries, soups, stews, and curries.