Rubiaceae

Ophiorrhiza sp.?

Quang Ninh Province, Van Don District, Minh Chau Commune, Bai Tu Long National Park, Ba Mun protection sector|, Ba Mun Island, around point 21º04’33’’N 107º35’28’’E. Secondary broad-leaved evergreen forest with bamboo on rocky sandstone slopes at elevation 40–100 m a.s.l. Erect terrestrial herb or undershrub to 0.8 m tall in rather open place. Flower buds whitish. Occasional.

21 May 2025, Cuong Huu Nguyen, Ha Van Dang, Ly Van Nguyen, Nam Van Duong, Tuan Thanh Tran, Hai Xuan Cao, L. Averyanov, T. Maisak, AL4415 (NHC208).