Geostachys Ridley 1899

Key to species of Geostachys in Cambodia, Laos and Vietnam 1. Inflorescence decurved; flower-bearing branches secund; flowers yellow..................................................................... G. pierreana - Inflorescence erect; flower-bearing branches evenly distributed around the rachis; flowers white, or white with labellum and stamen spotted with dark pink to red..................................................................................................................................................2 2. Flowers plain white with no spotting (Laos)........................................................................................................................... G. sp. A - Flowers white, labellum and stamen spotted dark pink to red...........................................................................................................3 3. Leaf sheaths and ligules plain green; apices of bracts, bracteoles and calyx lobes prominently aristate or mucronate.................................................................................................................................................................................................................. G. aristata - Leaf sheaths spotted or reticulate with dark red, ligules dark red; apices of bracts, bracteoles and calyx lobes round or obtuse with no prominent aristae..................................................................................................................................................... G. annamensis
Published as part of Leong-Škorničková, Jana, Bình, Nguyén Qu ốc, Đăng, Tr ần H ữu, Trư ờng, Lưu H ồng & Nuraliev, Maxim S., 2023, A revision of Geostachys (Zingiberaceae: Alpinioideae) in Cambodia, Laos and Vietnam, including a new species, G. aristata, pp. 245-260 in Phytotaxa 585 (4) on page 246, DOI: 10.11646/phytotaxa.585.4.1, http://zenodo.org/record/7703837