Oreocharis longituba W.H.Chen, Q.H.Nguyen & Y.M.Shui, sp. nov. (A–H) and its most similar species, Oreocharis hirsuta Barnett (I–L) A Habitat B Mature plant C Abaxial leaf surface D, E Front view of flower F Pistil with immature stigma, disc and calyx G Lateral view of flower H Opened corolla I Mature plant J Flower and fruits K Front view of flowers L Side view of flowers. Scale bars: A, I =5 cm, D–H = 1 cm; J, K, L= 2 cm. A–H photographs by Yu-Min Shui, I–L by Preecha Karaket of Middleton et al. 4550.