Morphoanatomy, histochemical and secretions process of extrafloral nectaries in Joannesia princeps Vell. (Euphorbiaceae) - Freitas-Silva, Larisse de; Araújo, Hugo Humberto de; Meira, Renata Maria Strozi Alves; Tanaka, Francisco André Ossamu; Silva, Luzimar Campos da (Flora, 2023)