THE EPIDERMAL SYSTEM. 



105 



the tooth to the water-cavity ; in the tooth it becomes greatly enlarged, 

 and is there composed of spiral cells (tracheideB), which surround a 

 central mass of narrow elongated parenchymatous cells (Pig. 95, c, g). 

 The bundle terminates by the free ends of the parenchyma-cells extend- 



Kg. 95.— Vertical section of a leaf-tooth of Fuclma gloiosa. o, vertical longitudi- 

 nal section of water-pore ; b, water-cavity ; o, tracheides ; d, chlorophyll-bearing 

 parenchyma ; e, large cell containing raphides ; /, hair ; gr, parenchyma of the fibro- 

 vascular bundle. Tne lower part or the figure passes into the leaf-blade. X 183.— 

 After Arthur. 



Ing loosely into the water-cavity. Between the bundle and the epider- 

 mis of the leaf-tooth lie two or three cell Jayers of ordinary chlorophyll- 

 bearing parenchyma, in which there are occasionally large cells con- 

 taining raphides (Fig. 94, cp and ra).* 



* The foregoing account of the water-pores of Fuchsia gldbosa, and 

 the drawings for Figs. 93-4^5, are taken from an unpublished paper 

 on ■• Tlie Water-Pores of Fuelma gldbosa," by J. C. Arthur. 



