Wang, C.-H., Liu, Z.-E., Li, Y. and Wang, X.-F. 2018.

Wang, C.H., Liu, Z.E., Li, Y. & Wang, X.F. (2018) A new species Rubia urceolata (Rubiaceae: Rubieae) from Shennongjia National Park, central China. Phytotaxa 357 (3): 220–224.

. Phytotaxa. 373, 4 (Oct. 2018), 300–300. DOI:https://doi.org/10.11646/phytotaxa.373.4.6.