N.Vietnam, Hoa Binh prov., Mai Chau distr., Van Mai municipality, along road between Van Mai and Thanh Hoa, approximately 2 km SW of Van Mai village around point 20°34′17′'N 105°01′58′'E at elev. 600-650m. Disturbed secondary and remnants of primary dry broad-leaved forest on upper ridge slopes on limestone and shale soils with large, anciently eroded marble-like crystalline limestone. Palm up to 2 m tall, forming small clumps, flowering and fruiting in light gaps in the canopy. Leaves deep green, buds green, flowers dull yellow-orange, green at tip. Locally abundant. 13 December 2002 D.Harder, N.T.Hiep, L.Averyanov et al., DKH 8188.