Pammel — Anatomical Characters of Seeds of Leguminosae. 171 



ISfutrient. The layer is compressed; the cells are thin- 

 walled, elongated, and contain pigment and protein. Walls 

 color pale blue with chlor-iodide of zinc. 



JEndosperm. Aleurone cells thick-walled with the pore- 

 canals slightly irregular. The cells are larger than in Aeschy- 

 nomene or Astragalus. In most parts of the seed the aleu- 

 rone is the extent of the endosperm ; laterally, however, more 

 endosperm occurs, and here it is mucilaginous. Walls color 

 blue with chlor-iodide of zinc. Cells contain fat and protein. 



Embryo. The cells of the first row smaller and nearly 

 isodiametric, the exterior walls thickened ; cells below larger, 

 longer than wide. The walls color blue with chlor-iodide 

 of zinc. The cells contain an abundance of fat and protein. 

 On the addition of iodine a few elliptical or spherical starch 

 grains may be seen. On the addition of chlor-iodide of zinc 

 a great many more grains are colored. — (Wyoming, Nelson, 

 Mo. Bot. Gard. ) 



Desmodium, Desv. (^Meihomia, Adans.) 



Malpighian cells carry pigment in variable amounts. Os- 

 teosclerids are of the characteristic I-shape. Chalon studied 

 several species with reference to endosperm, finding it present 

 in D. fioribundur)i, G. Don., D. canadense, DC, D. gyrans^ 

 DC, D. incanum, DC, D. latifolium, DC, D. gangeiicum^ 

 DC, D. uncinatum, DC,i). triquetrum, DC, and D. umbel- 

 laium, DC All of the species which I have examined contain 

 endosperm, e. g., D. nudiflorum, DC, D. canescens, DC, D. 

 strictum, DC, and D. Dillenii, Darl. Lubbock .studied the 

 germination of D. canadense, but does not describe the seed. 



Desmodium canescens, DC {3f. canescens, h., Knnize.) 



Pl.XV.f. 3a. 



Testa and endosperm 140-150 /-t thick. The testa is 

 uniform but the endosperm is variable. 



Malpighian. Cells 50-52 /x in length. Cuticle uneven; 

 cuticularized layer narrow; light line runs close under the 

 cuticularized layer; several pore-canals extend into the 

 wall below the hght line, which connect in part with the cell- 

 cavity. The cell-cavity is large at the base but narrows rather 

 abruptly, and in upper part occurs as a narrow cavity to the 



