208 Trans. Acad. Sci. of St. Louis. 



testa is made up of osteosclerids ; followed by several rows 

 of thin- walled parenchyma. Endosperm and embryo similar to 

 C. nictitans and O. Chamaecrista. — (Cult. Mo. Bot. Gard., 

 St. Louis, Pammel.) 



CAESAIiPINIEAE — Eucaesalpinieae. 



HOFFMANSEGGIA, Cav. 



Chalon found endosperm in H. falcaria, Cslv.-, detailed 

 studies, however, were not made. The character of the Mal- 

 pighian cells shows that the genus is closely related to 

 Gymnocladus and Gleditschia. The cotyledons also agree 

 with these genera. In both of our species the endosperm 

 is cartilaginous. 



& 



HOFFMANSEGGIA JaMESII, T. & G. 

 PI. XIX. f. 2-2b. 



Testa and endosperm are 225-250 fi thick; the cotyledons, 

 996 /* across. 



Malpighian. The cells are 64.4 /i long. Cuticle is smooth; 

 cuticularized layer well developed; the narrow upper light 

 line occurs under the cuticularized layer: a broad and re- 

 fractive zone occupies one-third of the upper part of the cell. 

 The cell-cavity is wide at the base, gradually tapering upward. 

 Pore-canals several, extending beyond the upper light line. 

 The canals are enlarged in the upper part of the cell, giving 

 this part of the cell a beaded appearance. Cells contain 

 a yellow pigment, and numerous small grains consisting of 

 protein. 



Osteosclerid. Cells of the layer widely separated, with large 

 intercellular spaces. Walls thickened, color blue with chlor- 

 iodide of zinc. 



Nutrient. This layer is not strongly developed. Cells are 

 elongated, thick-walled but scarcely sclerotic as in Cassia. 

 Its structure approaches Apios. 



Endosperm. The aleurone layer consists of thick-walled 

 cells, containing protein ; the cells below are thick-walled with 

 large pore-canals, and likewise contain protein. Internal layer 

 with thick-walled cells and a small lumen. Usually only one 

 layer of cells evident in the endosperm. 



