Sylvester, S.P. (2014)

Bartsia lydiae, a new species of Bartsia sect. Laxae (Orobanchaceae) from the southern Peruvian Andes with a revised key to Bartsia sect. Laxae

. Phytotaxa 164 (1): 41–46. https://doi.org/10.11646/phytotaxa.164.1.4