Hornstedtia tibetica was originally described only from fruiting material. On the basis of morphological study of flowering material originating at the type locality, the species is a member of Amomum. This was also confirmed by palynological evidence and a molecular analysis based on ITS region. A new combination Amomum tibeticum is therefore established here, together with a detailed description and colour plate of this species. As previously suspected from the similarity of the original description and type, Hornstedtia arunachalensis is conspecific with A. tibeticum and is therefore synonymised here. The only remaining species of Hornstedtia in China is therefore H. hainanensis, which was also described only from fruiting material. To aid unambiguous understanding of this taxon, we provide a detailed description and colour plate based on recent collections of flowering material near the type locality in Hainan Province, China.