[1]
Yuan, M.-D. and Wang, R.-J. 2020.

Involucrella lithophila (Rubiaceae: Spermacoceae): A new species from Guangxi, China

. Phytotaxa. 464, 1 (Oct. 2020), 59–68. DOI:https://doi.org/10.11646/phytotaxa.464.1.4.