Alstonia
Pakistan
Nazimuddin, S. and M.Qaiser (1983). Apocynaceae. In: E. Nasir and S.I. Ali (eds.), Flora of Pakistan 148, pp. 1-41. Department of Botany, University of Karachi, Karachi.
S. Nazimuddin and M. Qaiser (2018). Alstonia species, in: KeyBase: Flora of Pakistan, <https://keybase.rbg.vic.gov.au/keys/show/8613> [Seen: 13-05-2024].
KeyBase (2024). Flora of Pakistan: Alstonia species. https://keybase.rbg.vic.gov.au/keys/show/8613 [Seen: 13-05-2024].