Merremia boisiana (Convolvulaceae). Voucher: Swenson et al. 1520. Vietnam, Nghệ An Province, Buffer zone of Pu Mat National Park, along a road under construction between Chân Khe checkpoint and the Laotian border, above Choang River, alt. 150 masl (19.00417 104.73472). Swedish Museum of Natural History expedition to Vietnam 2013, sponsored by National Geographic Global Exploration Fund Northern Europe.