Fig. 22
From: The adjustment of China endemic Heptacodium miconioides Rehd. to temperate zone of Poland
Transverse sections of periderm layer (a) and stomata of epidermis (b, c) in the 1-year stem H1 of Heptacodium myconioides. Designations: ck – cork; co – cortex; cr – crystals; cu – cuticle; ep – epidermis; pl – phellem; so – stomata. Scale bars 100 µm