Pammel — Anatomical Characters of Seeds of Leguminosae. 135 



brown, and contain tannin; also a small amount of lignin in 

 the upper part of the wall. 



JSTuirient. This layer varies in width, and is compressed. 

 On the addition of chloral h^'drate four layers of thin-walled 

 cells may be made out, although the number of rows varies 

 in different parts of the section. In the hilar region these 

 number from 12 to 15 and are of lisrhter color than elsewhere. 

 The lower parts of the layer contain the vascular elements, 

 also thick-walled cells. In the hilar region these cells are 

 thinner walled, and darker in color than in the remaining 

 lower parts of this layer. 



Endosperm. This is differentiated into three parts. In 

 the first row or aleurone layer, the cells are thick-walled, 

 nearly isodiametric, filled with granular contents, fat, and 

 albuminoids. Cell- walls mucilaginous and cells contain pro- 

 tein. In the lower portion of the endosperm the cells are 

 elongated and thick- walled, with a narrow cavity. 



Embryo. The first row of cells much smaller, forming a 

 compact, continuous layer; cells below larger, except the 

 procambial cells. All of the cells are filled with protein 

 grains and fat. Starch absent. Chloral hydrate causes the 

 fat to come out in the form of globules. — (St. Louis, Eggert, 

 Mo. Bot. Gard.) 



Thermopsis, R. Br. 



Thermopsis caroliniana, M. a. Curtis. 



PI. VII. f. 2-2c. 



Different layers of testa quite uniformly developed, except 

 in the hilar region. On sides 298.8 // thick. 



Malpighian. Yellowish cuticle uniformly covering these 

 cells, 1.4// in thickness; this readily separates from the re- 

 mainder of the Malpighian cell; the latter is 75.6 ij. in length 

 with a rather wide light line extending across the cells under- 

 neath the cuticle. Several canals extend into the cell-walls 

 from the surface. Cell-cavity has its greatest width at the 

 lower end, graduallj'^ tapering upwards into a narrow line; 

 contains some protein grains, which color brown with chlor- 

 iodide of zinc. Cell-walls color blue. 



Osieosclerid. The cells are quite uniform on sides, 28 n in 

 length, on ends larger. Cell-walls thickened, with large inter- 



