Pammel — Anatomical Characters of Seeds of Leguminosae, 183 



length as 135-185 /jl. This varies somewhat in different varie- 

 ties. The form studied was sold under the name of broad 

 bean — a large-seeded cultivated garden variety. Cuticle 

 slightly irregular; light line below the cuticularized layer; 

 cell-cavity irregular, constricted at several places, conspicu- 

 ously enlarged below the middle, then usually tapering 

 upward. Lateral canals project into the walls as in V, 

 saliva. Beck mentions the occurrence of a silicified body in 

 the cell-cavity, but I have been unable to make this out. One 

 or more conspicuous chromatophores occur in the cell-cavity. 

 In addition to the lateral pores, long longitudinal canals ex- 

 tend from the surface. These in some cases connect with the 

 cell-cavity below the light line or at the constricted partition. 

 The cells are colored brown, especially the lower part. With 

 chlor-iodide of zinc the cuticularized layer and a broad clear 

 band below, the light line, color blue rapidly. 



Osteosclerid. The osteosclerids vary in length from 70- 

 140 /A. Harz gives their length at 58-68 fi, becoming larger 

 in the hilar region; here assume considerable importance, 

 comprising more than one row of cells. The walls are 

 greatly thickened and frequently have lateral processes. In 

 part these cells are joined to the thick-walled parenchyma. 

 In parts of the seed away from the hilum and raphe the cells 

 are prominently marked with longitudinal canals. 



Nutrient, This layer is differentiated into two or three 

 parts ; the cells are thin-walled, but in the lower part of the 

 layer thicker-walled. Contents stain deeply with fuchsine. 

 The lower portion contains an abundance of pigment, depos- 

 ited in two forms, one in large scattered elliptical or spher- 

 ical masses darker in color than the pigment of the remain- 

 ing cells. The vascular elements are contained in the nutrient 

 layer. 



Endosperm. The endosperm consists in the main of some- 

 what elongated cells with mucilaginous walls; the contents 

 consist of protein. 



Embryo, The exterior walls of the epidermis thick; 

 the walls of underlying cells less thickened; towards the 

 interior the cells become larger ; the internal face of the 

 cotyledons without palisade parenchyma, but the underlying 



