Transpiration and Water Movement 



91 



LEAVES WITH No STOMATA ON THE UPPER SURFACES 



PLANT 



STOMATA PER SQ. MM. 

 LOWER SURFACE 



Abies balsamea (balsam fir) 

 Acer pseudoplatanus (Norway maple) 

 Anemone nemorosa (wind anemone) 

 Begonia, coccinea (red begonia) . 

 Berberis vulgaris (barberry) . 

 Ficus elastica (rubber plant) . 

 Juglans nigra (black walnut) 

 Lilium bulbiferum (lily) .... 

 Morus alba (white mulberry) . . 

 Ribes aureum (red currant) . 

 Syringa vulgaris (lilac) .... 

 Tropceolum majus (nasturtium) . 



228 



400 



67 



40 



229 



145 



461 



62 



480 



145 



330 



130 



LEAVES WITH STOMATA RELATIVELY SCARCE ON UPPER SURFACES 



LEAVES WITH STOMATA MORE NEARLY EQUAL ON BOTH SURFACES 



