Pammel — Anatomical Characters of Seeds of Leguminosae. 207 



Walls with radiating pore-canals. The walls color blue with 

 chlor-ioclide of zinc. 



Endosperm. The aleurone cells are thick-walled and con- 

 tain small protein grains. They are followed by the thick- 

 walled mucilaginous reserve cellulose. Eeactions of the 

 cell-walls similar to those of Cercis canadensis. 



Embryo. First row of cells small, nearly isodiametric ; 

 cells below elongated, with small intercellular spaces; the 

 embryo contains no starch but there is an abundance of fat 

 and protein ; palisade cells on the superior face of the coty- 

 ledons. 



Cassia nictitans, L. 



Fl, XX. f. 2. PL XXXIV. f. 5. 



Testa and endosperm 165-350//. wide. Malpighian cells 

 50-53 fjb long ; the upper part of the cell contains more pig- 

 ment; light lines as in O. Chamaecrisia. The thick-walled 

 osteosclerids are but slightly differentiated from the cells of 

 the nutrient layer, 10-12 /x long. Nutrient layer well-devel- 

 oped, cells thick-walled and sclerotic, containing a brown 

 pigment. The inner testa as in other members of the genus. 

 The endosperm as in O. Chamaecrista^ differentiated into 

 aleurone, middle mucilaginous reserve cellulose, and internal 

 layers. Embryo as in the last species. — (St. Louis, Mo., 

 Pammel. — Ithaca, N. Y., Stewart.) 



Cassia marylandica, L. 



PI. XX. 5- 5b. 



Chalon studied the species with reference to endosperm. 

 Testa and endosperm 500-530 /* thick. Malpighian cells 

 92.4 iJb long, more deeply colored in the lower part. Cuticle 

 and cuticularized layer well developed ; the narrow light line 

 occurs close under the cuticularized layer; the second light line 

 is wider, and occurs 40 /a from the cuticle, although its posi- 

 tion is somewhat variable. Pore-canals in two series, one in 

 the light line region and a second below. Osteosclerids 20- 

 22 fi long; walls plainly differentiated into two parts; the 

 cell-cavity almost obliterated in some cells. The cells are as 

 a rulel-shaped, containing pigment and tannin. Cells of the 

 nutrient layer are sclerotic ; the walls are brown, while the cell- 

 cavities are much deeper in color. The first layer of the inner 



