taxonID	type	description	language	source
CB6434C8C40158E6BF8AAF4CC2894FCC.taxon	description	Figs 1, 2, 3	en	He, Xuan-Ze, Dai, Zheng-Xian, Xu, Jian, Yang, Jia-Wen, Tang, Sheng-Hu (2026): Ophiorrhiza xishuiensis (Rubiaceae), a new species endemic to Guizhou, Sichuan, and Chongqing, China. PhytoKeys 275: 163-176, DOI: 10.3897/phytokeys.275.189435
CB6434C8C40158E6BF8AAF4CC2894FCC.taxon	biology_ecology	Ophiorrhiza typically prefers to grow near streams or in damp areas. Few people have paid attention to its sap. We examined the new taxon and O. japonica and found that the new taxon has a very small amount of white sap, while the latter has a very small amount of transparent, water-like sap, which becomes visible when cutting the petiole. Ophiorrhiza often has colleters inside the stipules and calyx. However, the colleters inside or on the bracts and bracteoles have often been overlooked. We examined the new taxon and O. japonica and found that both have bracteoles with a single globose colleter (yellow in colour) on each side of the inner base. Sometimes, the new taxon has red sparse colleters on both the adaxial and abaxial surfaces of the bracteoles, as well as on the margin, while O. japonica has yellow sparse colleters. Further research on the presence / absence and position of colleters in the genus is needed to better understand the taxonomical value of this character.	en	He, Xuan-Ze, Dai, Zheng-Xian, Xu, Jian, Yang, Jia-Wen, Tang, Sheng-Hu (2026): Ophiorrhiza xishuiensis (Rubiaceae), a new species endemic to Guizhou, Sichuan, and Chongqing, China. PhytoKeys 275: 163-176, DOI: 10.3897/phytokeys.275.189435
