Fig. 040. I. Cross-section of Leaf.

e. Epidermis (upper surface). e. Epidermis (under surface). p. Palisade cells under which are the mesophyll cells. k. Crystal-containing cells (calcium oxalate in minute crytals). l. Simple trichome. d. Head-bearing and gland-bearing trichome.

This image is from Belladonna in King's American Dispensatory, 1898.