Vientiane prov., Kasi distr., between Pa Chao and Nam Ken villages, Pa Chao Mt., around point 19°19'50.6''N 102°21'20.5''E. Secondary broad-leaved evergreen dry forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 1000-1100 m a.s.l. Large woody vine in open rocky slope. Flowers light pink. Not common.
Luang Prabang prov., Pon Xay distr., between Houay Man and Nam Bo villages, Phou Hua Ben Toc Mountain, around point 19°57'33.1''N 102°25'25.8''E. Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 500-650 m a.s.l. Woody vine 6-8 m long on rocky mountain tops. Fruits green. Occasional.
Luang Prabang prov., Ngoy distr., Nong Khiew village, Pha Deng Mountain around point 20°34'14.3''N 102°37'31.8''E.
Secondary semideciduous and evergreen dry forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 700-825 m a.s.l. Woody vine on mossy cliff on rocky mountain top. Flowers dark red to reddish brown buds dull yellowish. Not common.
Vientiane prov., Vang Vieng distr., Patang village, around point 19°04'15.6''N 102°24'33.2''E. Secondary broad-leaved semi-deciduous dry forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. about 670 m a.s.l. Tree 4-5 m tall. Fruits orange. Common.
Luang Prabang prov., Ngoy distr., Ngoy village, around point 20°42'52.9''N 102°41'15.5''E. Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 800-900 m a.s.l.
Terrestrial herb or undershrub 1-1.5 m tall in open place. Flowers white. Occasional.