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. 



Endosperm. 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 low^er end are not so thick. A layer of thick- 

 walled, elongated cells with protein matter joins the cotjde- 

 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. 



Malinghian. Cells variable, longest 95.2 jx 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 — Soplioreae. 

 Cladrastis, Raf. 

 ClaDrastis tinctoria, Raf. {C. lutea, Michx., Koch.) 



Pl.X.f. 5. 



Testa not strongly developed, total thickness on sides 

 131.6 u. 



