Description from Flora of China
Arduina carandas (Linnaeus) K. Schumann; Damna-canthus esquirolii H. Léveillé.
Shrubs, small trees, or climbers to 5 m tall. Spines simple or forked, to 5 cm. Leaf blade broadly ovate to oblong, 3-7 X 1.5-4 cm, base broadly cuneate to rounded, apex short apiculate; lateral veins ca. 8 pairs, ascending, convergent, anastomosing near margin. Cymes terminal, usually 3-flowered; peduncle 1.5-2.5 cm; bracteoles minute. Flowers fragrant. Pedicel about as long as calyx or slightly longer. Sepals 2.5-7 mm, with many basal glands inside. Corolla white or pale rose; tube to 2 cm, puberulent inside; lobes lanceolate, ca. 1 cm, acute, overlapping to right, puberulent, ciliate. Ovules numerous in each locule. Berries reddish purple, ellipsoid, 1.5-2.5 X 1-2 cm. Fl. Mar-Jun, fr. Jul-Dec. 2n = 22.
Cultivated for its edible fruit, which can be eaten raw, made into jelly, or used for pies.
Fujian, Guangdong, Guizhou, Hainan, Taiwan [India, Indonesia, Malaysia, Myanmar, Sri Lanka, Thailand]