Pammel — Anatomical Characters of Seeds of Leguminosae. 153 



show rifts due to the collapse of the mucilaginous cuticular- 

 ized layer. The narrow light line forms a distinct zone below 

 the cuticularized portion ; both color blue with chlor-iodide 

 of zinc soon after the addition of the reagent. Pore-canals 

 elongated, extending nearly to the lower part of the cell. 

 Cell-cavity small, containing a brown pigment, the walls colored 

 in the same way. 



Osteosderid. The thick-walled cells are elongated ; upper 

 and lower bars nearly equal; cell-cavity small; intercel- 

 lular spaces elongated. Cells contain protein grains and 

 pigment. 



Nutrient. Layer unequally developed; cells are elon- 

 gated, and loosely arranged. Pigment abundant in the lower 

 part of layer; the vascular elements also occur in this portion. 

 The walls color blue with chlor-iodide of zinc. 



Endosperm, Sparingly developed. Aleurone cells some- 

 what elongated, containing fat and protein grains ; this layer 

 is followed by the mucilaginous reserve cellulose, consisting 

 of large cells. Internal part of endosperm consists of thick- 

 waUed, elongated cells, containing protein grains and fat. 



Embryo. Exterior walls of the first row of cells are thick- 

 ened. The cells, which are smaller than those below, form a 

 continuous row. The interior cells are more loosely arranged. 

 The superior face consists of three to four rows of palisade 

 cells. The cells contain fat, protein, and small starch grains. 

 Cell-walls color blue with chlor-iodide of zinc. — (N. W. B., 

 Mo. Bot. Gard.) 



PSORALEA TENUIFLORA, Pursh. 

 PI. XL f. 1-lh. 



Testa well developed, 260-275 fi in thickness. The species 

 characterized by a conspicuous mycotic layer; endosperm 

 nearly wanting. 



Malpighian. Cuticle forms a thick, even layer; the weU- 

 marked light line occurs close under the cuticle ; numerous 

 pores project into the nearly colorless wall. Cell-cavity 

 irregular, constricted, containing one or more chromatophores 

 of different sizes, protein, and but a small amount of pigment. 



Osteosderid. Cell-walls greatly thickened; upper and 

 lower bars wide, 30-35 /i; constriction 20-25 //. Cells con- 



