140 Trans. Acad. Sci. of St. Louis. 



Genista, L. 



Detailed studies of the anatomy of the seeds have been 

 made by Nadelmann and Harz, and brief notes by Tschirch. 

 Schleiden and Vogel long ago pointed out that " Dyer's 

 Green Weed " is albuminous. On the addition of water the 

 horny endosperm becomes mucilaginous. The cell-walls are 

 greatly thickened. Schleiden and Vogel as well as Nadel- 

 mann and Harz speak of a green pigment found in the Mal- 

 pighian cells, to which the name of " Seladon green " has 

 been given. 



Genista tinctoria, L. 



Fl. X. f. 2-2c. 



Total thickness of testa including endosperm 332 //; 

 strongest development on the sides. 



Malpighian. Cells forming a continuous layer but in sec- 

 tions frequently showing rifts ; uniformly developed, 56 // in 

 length and wide in proportion to their length; cell-cavity 

 conspicuously wider at the lower end then gradually tapering 

 upward ; several canals projecting into the cell-wall ; light line 

 under the cuticularized portion, narrow but very bright. 



Osleosclerid. Cells short, thick-walled, nearly of equal 

 width except the constriction in the middle, which results in 

 a large intercellular space between the contiguous cells ; 

 slightly colored and somewhat compressed. 



Nutrient. Layer somewhat compressed, more conspicuous 

 than the osteosclerid layer ; walls colored greenish, containing 

 protein grains and coloring matter. 



Endosperm. Width varying in different parts of the seed 

 but attaining its maximum development on the sides between 

 caulicle and the chalazal region, and measuring 132.4 fi. 

 Aleurone cells thick-walled and conspicuously different from 

 the remainder of the endosperm (stated by Nadelmann not to 

 be different). Cells containing fat and protein grains. The 

 horny endosperm on the addition of water becoming muci- 

 laginous. Cells with well-developed pore-canals and the cell- 

 walls differentiated into two parts. On the addition of chlor- 

 iodide of zinc, the primary cell-wall colors blue rather slowly. 



