STARCHES. 79 



1. With a prominent hilum. At most 0.0066 



mm. Rice starch. 



2. Without a hilum. The largest 0.0088 mm. 



Millet starch. 

 II. Among the many angled, also rounded forms. 



a. Few partly rounded forms present, angular 



form predominating. 



1. Without hilum or depression, very small, 



0.0044 mm. Oat starch. 



2. With hilum or depression, 0.0132-0.0220 



mm. 

 a. Hilum or its depression considerably 



rounded; here and there the granules 



united into differently formed groups. 



Buckwheat starch. 

 h. Hilum mostly radiatory or star-shaped; 



all the granules free. Com starch. 



b. More or less numerous kettledrum and sugar- 



loaf -like forms. 



1. Very numerous eccentric layers; the largest 



granules 0.022-0.0352 mm. Batata starch. 



2. Without layers or rings, 0.008-0.032 mm. 

 a. In the kettledrum-shaped granules the 



hilum depression mostly widened on the 

 flattened side, 0.008-0.022 mm. Cassava 

 starch. 

 h. Depression wanting or not enlarged. 



aa. Hilum small, eccentric, 0.008-0.016 



mm. Pachyrhizus starch. 

 bb. Hilum small, central or wanting. 

 aaa. Many irregular forms, 0.008-0.0176 



mm. Sechium starch. 

 bbb. But few angular forms; some with 

 radiatory hilum fissure, 0.008-0.0176 

 mm. Castanospermum starch. 

 C. Granules simple and compound, predominant forms 



