Qiu, Z., Wang, X., Liu, Z., Yang, J. and Zhang, S. 2013. QIU, Z.J., WANG, X.L., LIU, Z.Y., YANG, J.F. & ZHANG, S.Z. (2012) Cytological and phylogenetic study of Petrocosmea hexiensis (Gesneriaceae), a new species from Chongqing, China. Phytotaxa, 74, 30–38. Phytotaxa. 89, 2 (Mar. 2013), 64–64. DOI:https://doi.org/10.11646/phytotaxa.89.2.3.