Dischidia is a genus of plants in the Milkweed family, Aocynaceae. They are native to tropical areas of China . Dischidia are closely aligned with the sister genus Hoya.
Most Dischidia grow in arboreal ant nests of different species and some have developed a symbiotic relationship where the plant has developed modified leaves to either provide housing or storage.
Of these there are two types of modification to the leaves. Three species develop bullate leaves which are hollow root-filled structures. These are Dischidia complex Griff. These bullate leaves are formed when the outer margins of a leaf stop growing while the center of the leaf continues to grow. As time progresses the leaf margins curl under to close the gap which creates a small hole.
A number of species develop imbricate leaves which hold tightly to the growing surface. The underside of the leaf has a space which is filled with roots that the ants take advantage of.