STAECH-GEAINS. 



105 



Fig. 119. 



Fig. 118. — Transverse section of Fig. 119. — Chlorophyll-corpuscles, 



the leaf of the Tsubaki ( Camellia a Spiral-shaped chlorophyll-corpuscle 



japonica), showing chlorophyll-cor- of a Spirogyra ; b star-shaped chloro- 



puscles. phyll-corpuscle of a Zygnema. 



2. STARCH-GRAINS. 



Starch-grains consist of starch, water, and a small pro- 

 portion of ash-constituents. They have one or more central 



Fig. 120. 



Fig. 120. — Starch grains, a Simple starch grain of the Jagataraimo ; 

 b compound starch grain of the same ; c starch grains from the seed of 

 the Fujimame (Doliclios cultratus) ; d starch grains of the Nishikiso (Eu- 

 phorbia humifusa) ; e starch grains of the Satoimo ; f starch grain of the 

 Satsumaimo (Ipomma Batatas). 



