I 2 6 
Notes . 
There are no stomata on the upper epidermis, and the cells of the 
latter have straight or slightly curved walls, while many of them are 
developed into small blunt papillae. 
The under epidermis has cells with wavy outlines and many 
stomata. 
Utrica pilulifera (Fig. 3). — The cotyledon has a deep apical sinus, 
at the base of which is a multicellular knob-like gland. Behind this 
Fig. 3. Group of water-pores on upper epidermis at apex of cotyledon of Urtica 
pilulifera. Observe the gland at base of the apical sinus ; the patch of water- 
pores behind the gland ; and the cystoliths. No other stomata occur on the upper 
epidermis of the cotyledon. 
gland is the apical patch of water-pores, which are more numerous 
— fifty or sixty — than in C. rapunculoides. 
The epidermal cells of the upper surface are slightly curved or 
rectangular. There are no stomata, but a surface view shows special 
rounded cells — the cystolith-cells. 
