DELPRETE, P. G.

Notes on calycophyllous Rubiaceae. Part V. A succinct overview of genera with calycophylls, and a revision of Pteridocalyx (Sipaneeae) with observations on distyly and calycophyll variation

. Phytotaxa, Auckland, New Zealand, v. 391, n. 1, p. 81–92, 2019. DOI: 10.11646/phytotaxa.391.1.6. Disponível em: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.391.1.6. Acesso em: 6 dec. 2025.