Labellar secretion and secretory trichomes of Rhetinantha cerifera (Barb. Rodr.) M.A.Blanco (Orchidaceae, Maxillariinae): micromorphology and composition - Mazzoni-Viveiros, Solange Cristina; Salatino, Antonio; Salatino, Maria Luiza Faria; Barros, Fábio de; Negri, Giuseppina; Cardoso‐Gustavson, Poliana; Castro, Marilia de Moraes (Brazilian Journal of Botany, 2019)