Pammel — Anatomical Characters of Seeds of Leguminosae. 139 



PAPILIONACEAE — Genisteae. 



Crotalaria, Dill. 

 Crotalaria sagittalis, L. 



Pl.X.f.4. 



The testa not strongly developed; endosperm 196// in 

 thickness. From Nadelmann's studies it appears that in 

 Crotalaria verrucosa the horny endosperm is well developed, 

 being four and one-half times as wide as the testa. The 

 aleurone layer contains fat and aleurone grains. The cells of 

 the embryo contain protein and fat but no starch. 



Malpighian. The cells are prismatic in surface view, 9.8 ^ 

 across, with five to six canals. In cross-sections they are 84 [x 

 long. The cuticle forms a continuous layer; with longitudi- 

 nal canals projecting into the cells; these extend down through 

 the upper part of the cell-wall and the cuticularized sub- 

 stance ; this layer is lighter in color than the rest of the cell- 

 wall, and separates from the remainder of the cell in the form 

 of a band. The narrow light line occurs close under the 

 cuticularized layer. The cell-cavity is narrow and gradually 

 tapers upward; it contains some protein matter. The cell- 

 wall consists of cellulose. 



Osteosclerid. The walls are thickened. Cells wide in the 

 lower part and narrowing upwards, with large intercellular 

 spaces. Cells contain protein. 



Nutrient. Consists of radially elongated cells, which are 

 slightly compressed. Walls of medium thickness, slightly 

 colored. 



Endosperm. Not strongly developed. The cells of the 

 aleurone layer large, containing protein. Two layers follow 

 this, the cells very much compressed, and somewhat radially 

 elongated. The lower portion radially elongated, of thick- 

 walled cells. All of the cells contain protein and fat. 



Embryo. Cells of outer row smaller; those adjoining the 

 endosperm thicker-walled, the inner part with thinner walls. 

 The remaining cells of the embryo larger. All of the cells 

 filled with protein. Starch is absent. 



