152 Trans. Acad. Sci. of St. Louis. 



roughened ; followed by a rather wide cuticularized layer. 

 Conical layer not very evident. Narrow light line immediately 

 below the cuticularized portion. Cell-cavity large at the base, 

 and terminating rather abruptly. Cell-walls and contents 

 brown in color; cells containing tannin. The walls color blue 

 with chlor-iodide of zinc. 



Osfeosclerid. Cells short, as wide above as below; 

 I-shaped, prominently constricted. Longitudinal striae of 

 walls not evident. 



Nutrient. Layer differentiated into two parts, the upper 

 more compressed than the lower; cells thin- walled, the walls 

 deeply colored. 



Endosperm. Cells of the aleurone layer thick-waUed, 

 in outline more or less quadrangular; containing fat and 

 protein grains. The mucilaginous reserve cellulose layer 

 follows ; this is of variable thickness and agrees with Lotus 

 corniculatus. The conspicuous pore-canals connect with 

 adjoining cells. The internal part of the endosperm is more 

 or less compressed and consists of thick-walled, elongated 

 cells; the narrow lumen contains proteid substances. 



Embryo. The exterior walls of the first row of cells are 

 thicker than the lateral. This layer forms a continuous row 

 of nearly isodiametric cells. The cells below are somewhat 

 irregular, with intercellular spaces in the angles. Superior 

 face with two rows of palisade cells. Cells contain fat and 

 protein grains but no starch. — (Oklahoma, Waugh, Mo. 

 Bot. Gard.) 



PAPILIOXACEAE — Galegeae. 



PSORALEA, L. 



The Malpighiau cells are well developed. Conical layer 

 absent. Osteosclerids thick-walled, non-striated; endosperm 

 but sparingly developed. 



PsoRALEA MELiLOTOiDES, Michx. (P. pedu7iculaia, MiU., 

 Vail.) 



PI. XI. f. 4-4c. 



Testa and endosperm of variable thickness, 160-200 /a, 

 most of this variation being found in the testa. 



Malpighian. Cuticle thick, slightly irregular; sections 



