LM and SEM images: E. alba (A,B), E. eugenioides (C,D,K), E. fasciculosa (E,F), E. robusta (G,H,L), and E. stoatei (I,J). LM: (A,C,E,G,I)—leaf epidermis stained with safranin and showing overlying cells covering the secretory cavities. SEM: (B,D,F,H,J)—leaf surface with more (B,F,J) or less (D,H) evident papillae. LM: (K,L)—two types of stomata, actinocytic and anomocytic, are shown; actinocytic stomata in the epidermis of E. eugenioides (K, arrows), and anomocitic stomata in the epidermis of E. robusta (L, arrow). Overlying cells (sc) in correspondence with the secretory cavities, papillae (pa), and stomata (st). 50 µm Bars.