FLORA OF VIETNAM Aristolochiaceae Aristolochia sp.
Quang Tri Prov., Huong Hoa Distr., Huong Viet municipality around point 16°51′06”N 106°34′38”E.
Partially destroyed primary broadleaved evergreen forest on very steep rocky slopes of remnant hills composed with solid highly eroded crystalline limestone at elev. about 600-700 m a.s.l.
Semi-woody vine 6-8 m long in shady place among secondary shrubs along road. Flowers dark brown, tube with white center. Not common.