Pammel — Anatomical Characters of Seeds of Leguminosae. 207 



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

 chlor-iodide of zinc. 



Endosperm. The aleuroue 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. 



PL XX. f. 2. PI. XXXIV. f. 5. 



Testa and endosperm 165-350 yu, wide. Malpighian cells 

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

 ment; light lines as in C. Chamaecrista. The thick-walled 

 osteosclerids are but slightly ditferentiated from the cells of 

 the nutrient layer, 10-12 yu, 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 C. 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 fx thick. Malpighian cells 

 92.4 /u, 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 /x 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 /i 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 



