170 Trans. Acad. Sci. of jSt. Louis. 



Osteosclerid. Cells are rather short, thick- walled, and with 

 somewhat elongated intercellular spaces. With sulphuric acid 

 and iodine the walls give the reaction for cellulose. 



Nutrient. This layer is much compressed, differentiated 

 into two parts ; cells of the lower part are thicker-walled, 

 with lumen much reduced. The cells contain tannin and 

 pigment. 



Endosperm. Variable in amount. The aleurone layer 

 consists of thick-walled cells containing protein; the cells 

 below are mucilaginous, and thick-walled; the internal part of 

 the endosperm consists of thick-walled elongated cells. The 

 reserve cellulose cells contain some protein. 



Embryo. The first row of cells smaller than those below, 

 the interior cells more loosely arranged ; palisade cells of the 

 inner face of the cotyledons comprise two rows. All of the 

 €ells contain fat and protein but no starch. — ( Curling-Joad 

 Herb., Mo. Bot. Gard.) 



Hedysarum, Tourn. 



Endosperm is but slightly developed, as Nadelmann indicates 

 for H. sihiricum. The same species was studied by Strand- 

 mark. Schleiden and Vogel have given an account of H. 

 ohscurum. Chalon studied seven species with reference to 

 the presence or absence of endosperm. In the species stud- 

 ied by myself it is not well developed. 



Hedysarum bore ale , Nutt . 



PL XV. f. 7. 



Testa and endosperm 95-100 /* in thickness. Endosperm 

 and nutrient layers vary somewhat. 



Malpighian. Cells 52-55 /^ long. Cuticle somewhat uneven, 

 and below it the narrow, sharply defined, cuticularized layer 

 with its conical projections ; the well marked but narrow light 

 line is below the cuticularized layer ; the cell-cavity is wide at 

 the base, gradually tapering upward ; each cell contains one 

 Idrge and occasionally several smaller chromatophores. 



Osteosclerid. Cells thick-walled, I-shaped, with an elongated 

 intercellular space. Chlor-iodide of zinc colors the walls less 

 intensely than the Malpighian cells. 



