Plate III. 



Fig. oU. Transverse sectiuii ui' the l)]cide of Trlchouantltcs cucumeroidts. 

 e, e})iderinal cell on the iiuder surface raised into conical papillae 

 outwards ; st, stoma ; jxi, pallisade jiarencliynia ; .sp, s[)ougy 

 parenchyma ; yj fibro-vasciilar bundle. Zeiss, 4xD. 



Fig. 40. Transverse section of the blade of MomonUca Charantia. c, cj'sto- 

 liths ; e, epidermis ; st, stoma ; -jm, pallisade parenchyma ; sp, 

 spongy parenchyma. Zeiss, 4xD. , 



Fig. 41. Transverse section of the blade of (Jijmaosteimna cissoldes. ch, 

 chlorojtlasts containing large spindle shaped starch-grains; e, e})i- 

 dermis ; d, stoma ; pa, pallisade parenchyma ; sp, spongy paren- 

 chyma. Zeiss, 4 X D. 



Fig. 42. Transverse section of the blade of Cucurbita Fepo through the 

 etiolated portion, c, epidermis ; e', many-layered epidermis ; pa, 

 pallisade parenchyma ; sp, spongy parenchyma. Zeiss, 4 x D. 



Fig. 43-48. Diagrammatic representation of six types of the mid-ribs of 

 the leaves in reference to the manner of development of tibro- 

 vascular bundles. Cross sections. Fig. 43. Actinostemma raee- 

 viosum ; Fig. 44. Jfelothria japonica ; Fig. 4.5. Gymnostemma 

 cissoidcs; Fig. 4(). Cucumis sativ us ; Fig. 47. Blovwrdica Charantia; 

 Fig. 48. Cucurbita Fepo. f, libro-vascular bundle. 



