Majure L. C., Puente R., Griffith M. P., Soltis D. E., Judd W. S., Opuntia lilae, Another Tacinga Hidden in Opuntia s.l. (Cactaceae), Systematic Botany, 2013, 38(2):444-450, doi: 10.1600/036364413X666688
The analysis of plastid and nuclear DNA leading to the transfer of the Venezuelan Opuntia lilae to Tacinga. The authors compare seeds, fruits, epidermis and floral traits, and consider the origin of the species' range far from Brazil. The paper includes the new combination Tacinga lilae and a comparison of its structure with T. palmadora.