Pammel — Anatomical Characters of Seeds of Leguminosae. 205 



extends across the cell below the cuticularized layer; the 

 upper part of the cell-cavity is widened just above the lower 

 light line ; part of the cell above the upper light line separates 

 readily from the remainder of the cell-wall. Below the 

 enlarged upper part of the cell-cavity the Malpighian cell is 

 more refractive than in the lower part. Cells contain in 

 addition to the chromatophores numerous small protoplasmic 

 granules. 



Osieosderid. Thick-walled cells not markedly different 

 from the cells of the nutrient layer. Small intercellular 

 spaces, adjacent to the Malpighian cells. 



Nutrient. Layer is differentiated into two parts; thick- 

 walled cells of the upper portion somewhat elongated or 

 nearly isodiametric, with pore-canals, containing but little 

 pigment ; cells of the lower portion elongated, thick-walled, 

 having small pore-canals. 



Endosperm. This is copious, cartilaginous when dry, 

 mucilaginous and nearly colorless when moistened ; the cells 

 of the aleurone layer are thick-walled and contain protein ; 

 layer below of variable thickness, consisting of ten or more 

 rows of thick-walled, mucilaginous cells, with prominent 

 pore-canals. The internal part consists of thick-walled elon- 

 gated cells with a narrow cell-cavity, or some cells with thin- 

 ner walls, containing remnants of protoplasm. Walls dif- 

 ferentiated into three parts; the secondary and tertiary laj^ers 

 color blue with chlor-iodide of zinc; the primary wall is thin 

 and not affected by this reagent. 



Embryo. The epidermal cells are nearly isodiametric, with 

 exterior walls thickened; the cells below are longer and more 

 loosely arranged, with small intercellular spaces ; palisade cells 

 on the inferior face of the cotyledons; all of the cells contain 

 protein and fat but no starch. Walls color blue with chlor- 

 iodide of zinc. 



CAESAL.PIXIEAE — Cassieae. 



Cassia, Tourn. 



Quite a large number of the species have been studied, but 

 more especially the medicinal species. Schleiden and Vogel 

 studied C. stipulacea, Soland., C. Fistula, L., C. speciosa, 



