Ipomoea osyrensis Roth in Roemer & Schultes, Syst. Veg., ed. 15 bis 4: 239. 1819; Argyreia aggregata (Roxburgh) Choisy; Lettsomia aggregata Roxburgh; Lettsomia aggregata var. osyrensis (Roth) C. B. Clarke.

Leaf blade densely gray tomentose or woolly abaxially, sparsely strigose-villous adaxially, hairs with distinct swollen bases. Fl. Aug, fr. Dec.

Specimens from the Deccan region in India have adaxially glabrous leaves, whereas those from east Asia, including China, are uniformly sparse hairy adaxially. Forests, thickets; near sea level. Hainan [?Bangladesh, ?Cambodia, India, Indonesia, Laos, ?Malaysia, Myanmar, Sri Lanka, Thailand, Vietnam]