Corf, Nat Herb Vo!. IX. 



Plate XI, 



FiQ. 1.— Raphides, or Needle-like Crystals of Oxalate of 

 Lime in Leaf-blade of Taro Plant iCaladium colocasiai. 

 Enlarged 100 DiiMETERS. 



Fig. 2.— a Single Capsule Discharging its Needles. Enlarged 

 200 Diameters. 



