154 Tratis. Acad. Sci. of St. Louis. 



tain protein grains, pigment, and tannin, and in color contrast 

 decidedly with the Malpighian layer. 



Nutrient. The cells of this layer are thick-walled, elon- 

 gated, and brown, containing protein grains and tannin. It 

 also contains the vascular elements. 



Mycotic. This layer is of considerable thickness, measur- 

 ing 56 {x; the cells are nearly colorless, thick-walled, and elon- 

 gated; the elongated, tortuous cells are partially separated by 

 numerous small intercellular spaces. 



JSfucellus. Although the development has not been studied, 

 I believe that the layer below the mycotic is the nucellus. 

 The cells are yqvj dark in color — much more so than the usual 

 nutrient layer or nucellus. 



Embryo . The outer row of cells continuous; no inter- 

 cellular spaces ; exterior walls thickened ; much smaller ( 14- 

 16X9.8-14//) than the parenchyma below; these measure 

 33.6-56X33-19.6//. Cells contain fat and protein grains 

 but no starch. 



PSOEALEA CUSPIDATA, Pursh. 



Tl. XI. f. 2-2b. 



Testa and small layer of endosperm 99.6-23.4/^ in thick- 

 ness, nearly colorless, as in P. tenuijlora. Osteosclerids also 

 agree with those of that species. The nutrient layer with a 

 great deal of pigment. Endosperm sparingly developed. 

 First row of cells of embryo somewhat elongated, with thin 

 lateral walls ; exterior walls thicker. Interior cells of em- 

 bryo thin-walled, with a triangular intercellular space at the 

 angles. — (Kerrville, Texas, Heller, Mo. Bot. Gard.) 



Amorpha, L. 

 Schleiden and Voo;el called attention to the mucilaginous 



O CI? 



endosperm of this genus. The species here studied mostly 

 agree as to their Malpighian cells. The endosperm is un- 

 equally developed. 



Amorpha canescens, Nutt. 

 PI. XI. f. 3-3b. 

 Testa and endosperm vary in thickness, 95-232 //, mostly 



