Contr. Nat. Herb.. Voi. IX, PLATE Xl. 
Fi@. 1.—RAPHIDES, OR NEEDLE-LIKE CRYSTALS OF OXALATE OF 
LIME IN LEAF-BLADE OF TARO PLANT (CALADIUM COLOCASIA). 
ENLARGED 100 DIAMETERS. 
FiG. 2.—A SINGLE CAPSULE DISCHARGING ITS NEEDLES. ENLARGED 
200 DIAMETERS. 
