136 Trans. Acad. Sci. of St. Louis. 



cellular spaces. These are much larger at the ends of the 

 seeds. Cell-cavity contains a small amount of protoplasmic 

 matter which colors brown with chlor-iodide of zinc. 



Nutrient. This is much compressed, consisting of from 

 three to six layers of cells. Cell-walls mostly thickened; 

 these as well as the contents are brown, owing to the pres- 

 ence of pigment and tannin. Spiral ducts also occur. 



^iidospei'm. This is well developed, especially on the sides, 

 the zone gradually narrows toward the end. First row of 

 cells smaller, thick- walled ; contain fat and protein. Fol- 

 lowed by two to seven layers of thick-walled cells constituting 

 the reserve cellulose. The cells contain protein and fat. The 

 cell-walls at the lower end are not so thick. A layer of thick- 

 walled, elongated cells with protein matter joins the cotyle- 

 dons. On the addition of chlor-iodide of zinc the cell-walls 

 of the endosperm color blue. 



Embryo. First row of cells continuous, with a large 

 nucleus. Outer cell-walls thicker than the lateral and inner. 

 Remaining cells larger, rather thick-walled, with conspicuous 

 intercellular spaces. All of the cells contain aleurone grains 

 and fat. A few small starch grains occur in the cells below 

 the outer row. — (Buckley, Mo. Bot. Gard.) 



Thermopsis rhombifolia, Richards. 



The seeds of the specimen studied were not mature. 



Malpighian. Cells variable, longest 95.2 [i in length. 

 Light line runs close under the cuticle and is not strongly 

 marked in specimen. 



Osteosclerid. Cells with large intercellular spaces. 



Nutrient. Cells nearly coloress, thin-walled and irregular. 



Endosperm. Walls of cells but slightly thickened. — 

 (Mont., Mo. Bot. Garden.) 



PAPILIOXACEAE — Sophoreae. 



Cladrastis, Raf. 



Cladrastis tinctoria, Raf. {G. lutea^ Michx., Koch.) 



Pl.X.f. 5. 



Testa not strongly developed, total thickness on sides 

 131.6//. 



