Xiangkhouang Prov., Peak Distr., Oran village, around point 19°38’53”N 103°23’12”E. Primary and secondary broad-leaved evergreen dry forest on shale sandstone slopes and along ridge edge at elev. about 1750-1850 m a.s.l.
Houphan Prov., Hem Distr., Na Puok village, Pu Tham Nhon mountain around point 20°10'00.0''N 103°24'37.0''E.
Primary and secondary broad-leaved evergreen dry forest on very steep rocky mountain slopes composed by solid marble-like highly eroded limestone at elev. 1050-1150 m a.s.l. Large tree. Flowers white. Common.
Xiangkhouang Prov., Kham Distr., Huad village, Phou tat Vinh mt., around point 19°33'02.2'N 103°39'56.3'E.
Secondary broad-leaved evergreen dry forest on alluvial valley and on foothills of limestone remnant mountains at elev. 700-750 m a.s.l. Treelet 3-4 m tall in shady place. Flowers dull dirty purple. Occasional.
Luang Prabang prov., Ngoy distr., Nong Khiew village, Ta Nang Non Mountain around point 20°33’29.2’’N 102°36’54.5’’E.
Secondary semideciduous and evergreen dry forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-650 m a.s.l. Treelet 6-8 m tall on mossy rocky mountain top. Fruits green with reddish-orange tint. Not common.
Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31'36.9''N 102°35'15.8''E.
Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream. Treelet 3-4 m tall in shady place. Young fruits dull 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. Treelet 6-8 m tall on open mossy rocks on mountain top. Fruits green with reddish tint. Not common.
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. Tree 6-8 m tall among secondary shrubs. Flowers dirty reddish-brown. Common.
Vientiane prov., Kasi distr., Si Sang Vone village, around point 19°06'10.9''N 102°10'46.1''E. Secondary broad-leaved evergreen dry forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-700 m a.s.l. Treelet 3-4 m tall on rocky steep slope. Fruits orange-red. Occasional.
Vientiane prov., Kasi distr., Si Sang Vone village, around point 19°06'10.9''N 102°10'46.1''E. Secondary broad-leaved evergreen dry forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-700 m a.s.l. Treelet 4-5 m tall on steep rocky, rather open slope. Flowers dull pink. Not rare.
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. Deciduous tree 14-18 m tall on steep rocky slope. Fruits bright orange-red. Common.
Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31'36.9''N 102°35'15.8''E.
Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream. Treelet 3-5 m tall on shady rocky stream slope. Flowers dirty pinkish. Common.
Luang Prabang prov., Ngoy distr., Don Khun village, near waterfall, around point 20°31'36.9''N 102°35'15.8''E.
Remnants of primary evergreen forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 450-550 m a.s.l. along mountain stream. Treelet 3-5 m tall on shady rocky stream slope. Flowers dirty pinkish. Common.
Luang Prabang prov., Pon Xay distr., along the way to Bane Phou Souong village, Pha Hiua Bin Toc Mountain, around point 19°57'37.0''N 102°25'03.0''E. Degraded primary evergreen and semideciduous forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 600-850 m a.s.l. Treelet 4-5 m tall on shady rocky slope. Fruits green with red tint. Not rare.
Houphan Prov., Viengxay Distr., Khang Pa Pong village, around point 20°19'41.4''N 104°25'10.6''E.
Primary and secondary broad-leaved evergreen dry forest on very steep rocky slopes of highly eroded mountains composed by solid marble-like limestone at elev. 1000-1100 m a.s.l. Shrub 2-3 m tall on mountain slope and on mountain top. Very common.
Son La Prov., Van Ho Distr., Van Ho comm., Hua Tat village, around point 20°46’21.7N 104°47’47.5E. Remnants of primary evergreen broad-leaved and mixed forest (with Pinus wangii) on very steep rocky slopes and on mountain tops composed with highly eroded karstic light gray marble-like limestone at elevation 1300-1350 m a.s.l. Shrub 1.5-2 m tall on rocky mountain top. Flowers white. Rare.