Bueno, V.R., Cassol, A.P.V., Leroy, C.J., Bueno, M.L. and Heiden, G. 2023. Calea × crassa (Neurolaeneae: Asteraceae), a new nothospecies from Paraná state, Brazil. Phytotaxa. 618, 2 (Oct. 2023), 133–148. DOI:https://doi.org/10.11646/phytotaxa.618.2.3.