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. niditans and C . Ohamaecrista. — (Cult. Mo. Bot. Gard., 

 St. Louis, Pammel.) 



CAESALiPINIEAE — Eucaesalpinieae. 



HOFFMANSEGGIA, Cav. 



Chalon found endosperm in H. falcaria, Cav. ; detailed 

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

 pighian cells shows that the orenus 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. 



PL XIX. /. 2-2h. 



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

 996 ^l across. 



Malpighian. The cells are 64.4 [x 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. 



