92 MICROSCOPICAL RESEARCH 



PLATE XI. 



LEAF STBTJCTUEE. 



Pig. 37. Transverse section. Leaf of ' Cypripedium sp ' x 20 dia. 

 Fixed in 92% Alcohol. Stained with Borax Carmine and 

 Malachite Green. 1. Lower epidermis of leaf. 2. Primary 

 ground tissue. 3. Vascular bundle. 4. Water storage cells 

 of upper epidermis, having their upper and under walls cut 

 away. 



Fig. 38. Transverse section. Leaf of Oycas. ' Cycas revoluta 

 X 35 dia. Fixed with the Chromo-Acetic solution. Stained 

 with Aniline-picrate and Grossypimine. 1. Lower epidermis 

 of leai. 2. Ground tissue. 3. Sclerenchymatous fibres. 



4. Bast elements of bundle. 5. Phloem elements. 6. Stomata. 

 7. Palisade layer containing chloroplasts, stained blue. 



Fig. 39. Transverse section. Leaf of Bottle-brush. ' Metrosideros 

 verni ' x 60 dia. Fixed with Chromo-Acetic solution. 

 Cut ^ / 2688 in. Stained with Aniline-picrate and Gossypimine. 



1. Palisade layer, continuous on upper and under side. 



2. Stomata. 3. Guard cells. 4. Primary ground tissue. 



5. Xylem elements of bundle. 6. Phloem elements. 

 7. Small vascular bundles. 8. Oil gland. 



Fig. 40. Part of Fig. 39 x 160 dia. 1. Cuticle. 2 and 3. Stoma and 

 guard-cell. 4. Primary vascular bundle. 5. Vascular 

 bundle in longitudinal section. 6. Palisade cells containing 

 chloroplasts, stained blue. 



