Jerusalem artichoke (Helianthus tuberosus) is a member of the flowering plant family (Asteraceae) and belongs to the same genus as the sunflower (Helianthus annuus). It has large leaves and small krätig-yellow flowers. In English-speaking countries, Jerusalem artichokes is known as sunroot.
Further names for the Jerusalem artichoke are: German potato, Erdartischocke, Erdäpfel, Erdbirne, Erdschocke, Erdsonnenblume, Ewigkeitskartoffel, Indianerknolle, Jerusalemartischocke, small sunflower, tuber sunflower, sugar potato in south bathingalso as Ross apples, since they were often fed to horses.
The perennial herbaceous plant grows up to three meters in some varieties up to almost four meters high. The tubers form upright stems. Stalked, egg-shaped rough leaves sit on these. These are seven to ten inches wide and between ten and twenty-five inches long.
The four to eight centimeters wide, cup-shaped inflorescences bloom in the period from August to November in a beautiful yellow. They sit in the axils of the upper leaves. The tongue and tube flowers are hermaphroditic. The seeds ripen because of the late floweringFlowering time in Central Europe usually not enough.
Nevertheless, the plants reproduce very well through their root tubers. In July and August, the plant forms elongated spindle-shaped tubers on the subterranean foothills, serving as a carbohydrate reservoir. Out of them, new sprouts will spring from them next spring.