78 VEGETABLE DRUGS WITH ORGANIC STRUCTURE. 



1. Large granules, 0.0396-0.0528 mm. Rye' 

 starch. 



2. Large granules, 0.0352-0.0396 mm. Wheat 

 starch. 



3. Large granules, 0.0264 mm. Barley starch. 

 b. Egg-shaped, oval, kidney-shaped. Hilum often 



long and ragged. 

 I. Large granules, 0.032-0.097 mm. Legumi- 

 nous starches. 

 IL Hilum eccentric, layers plainly eccentric or 

 meniscus shaped. 



a. Granules not at all or only slightly flattened. 



1. Hilum mostly at the smaller end, 0.06- 

 0.0 10 mm. Potato starch. 



2. Hilum mostly at the broader end, or toward 

 the middle in simple granules, 0.022-0.060 

 mm. Maranta starch. 



b. Granules more or less strongly flattened. 



1. Many drawn out to a short point at one end. 



a. At the most 0.060 mm. long. Curcuma 

 starch. 



b. As much as 0.132 mm. long. Canna 

 starch. 



2. Many lengthened to bean-shaped, disk-shaped 



or flattened; hilum near the broader end, 

 0.044-0.075 mm. Banana starch. 



3. Many strongly kidney-shaped; hilum near 



the edge, 0.048-0.056. Sisyrinchium starch. 



4. Egg-shaped ; at one end reduced to a wedge, 



at the other enlarged ; hilum at the smaller 

 end, 0.05-0.07 mm. Yam starch. 

 B. Granules simple or compound, single granules or 

 parts of granules, either bounded entirely by plane 

 surfaces, many angled, or by partly rounded sur- 

 faces. 

 I. Granules entirely angular. 



