[6] In Vietnam, the tree is common and found in primary broad-leaved closed forest in seasonally flooded stream valleys and very steep rocky slopes of isolated limestone mountains at 400–500 elevation.

[5] The habitat of the tree in Zhōngguó/China has suffered catastrophic damage because of clearance for agriculture and because of fruit harvesting, the plant has limited/scattered distribution, marking it as rare.

[5] Overall H. annamensis and its lowland forest habitats are threatened by agriculture, including annual and & perennial non-timber crops and livestock farming & ranching, by the gathering of terrestrial plants and by logging and wood harvesting[1] As noted above, the tree is found in Thailand, Cambodia, Vietnam, southern Yunnan and southern Guangxi in Zhōngguó/China.

[1] It occurs in the Phong Nha-Kẻ Bàng National Park, Quảng Bình Province, central Vietnam.

[5] The tree is known by a number of names, including: krâbau (Khmer);[6] nang trứng trung bộ, lọ nồi trung bộ, mạy ló, mắc la (Vietnamese)[8][circular reference]; and 大叶龙角, da ye long jiao (Chinese)[5] Media related to Hydnocarpus annamensis at Wikimedia Commons