Ferreira, P.D.L., Antonelli, A. & Groppo, M. (2021)

Touch me carefully: a step towards understanding morphological diversity in the South American spiny sunflowers (Compositae, Barnadesioideae)

. Phytotaxa 518 (2): 109–142. https://doi.org/10.11646/phytotaxa.518.2.3