Nomenclatural notes on species of Apocynaceae described from Cambodia, Laos and Vietnam Author Middleton, David J. Author Regalado J, Jacinto C. text Adansonia 2005 3 27 2 291 308 journal article http://doi.org/10.5281/zenodo.5186636 1639-4798 5186636 Kopsia tonkinensis Pitard in Lecomte Fl. Gén. Indo-Chine 3: 1135 (1933). HOLOTYPE . — Fleury 32111 ( P ), Vietnam , Vinh Phu , between Thanh-ba and Chan-mong forest reserves.