See text Dillenia is a genus of evergreen or semi-evergreen trees and shrubs in the flowering plant family Dilleniaceae, native to tropical and subtropical regions of southern Asia, Australasia, and the Indian Ocean islands.

[4]: 154–156 [5][6] The genus is named after the German botanist Johann Jacob Dillenius.

They are generally large, in the case of Dillenia reticulata reaching 1.27 m (4 ft 2 in) in length and about 41 cm (16 in) wide.

[8] The flowers are solitary, or in terminal racemes, with five sepals and five petals, numerous stamens (up to 900 in the case of Dillenia ovalifolia,[9] and a cluster of five to 20 carpels; they are superficially similar in appearance to Magnolia flowers.

[6] As of September 2024[update], Plants of the World Online recognises the following 60 species:[3]