International Aroid Society
Dracontium Roots

Primary roots of Dracontium eminate from the flattened apex of the tuber and grow downward in all directions, completely surrounding the tuber ( Fig. 9-12 ). Secondary roots start below the tuber apex and are subdivided into many smaller roots. The strong and often contractile root system functions not only in water- and nutrient-absorbtion, but also serves to support the plant. The roots hold the tuber in a position that facilitates the formation of the hollow spaces above and below the tuber. The tuber naturally assumes a deeper position when the roots dry out after each growing season.