Pammel — Anatomical Characters of Seeds of Leguminosae. 211 



dus. Moser's chemical analyses of G. glabra are given by 

 Harz and Konig. The seed contains 2.96 per cent, of fat; 

 20.94 of protein; and 51.68 of nitrogen-free extract, 21.24 of 

 this being dextrose, and 41 converted by sulphuric acid into 

 sugar. 



Gleditschia triacanthos, L. 



Fl. XIX f. 1-1 b. 



Harz, and Schleiden and Vogel give short accounts of the 

 structure of the testa and the endosperm. Testa and 

 endosperm 1135-1160 fi thick ; the endosperm varies from 

 600-675 fji thick; the sclerotic nutrient layer is 300 />« thick; 

 osteosclerids 25.2 /* long. 



Malpighian. Cuticle thick ; the straw-colored cuticularized 

 layer is followed by the narrow light line ; a wide refractive 

 zone occurs below the cuticularized layer, with no evident 

 pore-canals, which stains readily with haematoxylin. Below 

 the wide refractive band the pore-canals are enlarged, then 

 become narrow and project into the walls for some distance. 

 Cells contain protoplasmic remnants and some coloring matter. 

 The narrow light line is not stained with haematoxylin ; the wide 

 refractive zone stains, but less deeply than the remainder of 

 the wall, and the basal part of the cells is less colored than 

 the middle portion. 



Osteosclerid. The walls are greatly thickened. Cell-cavity 

 is small, almost disappearing where it is constricted. Inter- 

 cellular spaces are small. 



Nutrient. Cells variable in length, longer than broad. 

 The sclerotic parenchyma brown, containing a great deal of 

 pigment. 



Inner integument. The osteosclerids and the underlying 

 parenchyma are much compressed. The osteosclerids com- 

 pose a single layer of cells, followed by several rows of elon- 

 gated, thin-wailed parenchyma. The inner integument 

 readily separates from the outer testa, adhering to the 

 endosperm. 



Endosperm. The thick-walled cells of the aleurone layer 

 form a continuous row around the mucilaginous reserve 

 cells, these containing protein grains. The reserve tissue 

 consists of thick- walled cells with large pore-canals; the 



