204 Trans. Acad. Sci. of St. Louis. 



Cuticle well-developed; the narrow light line occurs below 

 the cuticularized layer; cell-cavity wide at the base with a 

 somewhat irregular outline, with one or more chromato- 

 phores and remnants of the protoplasm. 



Osteosclerids. The thick-walled I-shaped cells 19-20//, 

 long. Contents of cells and walls are brown in color. 



Nutrient. Differentiated into two parts ; cells of the upper 

 part thin-walled and larger than those of the lower portion. 

 All of the cells contain pigment and tannin. 



Endosperm. This usually consists of a single row of thick- 

 walled, elongated cells. Cell-cavity contains protein matter. 



Embryo. Epidermal cells much smaller than those below; 

 exterior walls thickened; cells below elongated, with small 

 intercellular spaces at the angles, the somewhat thickened 

 walls with pore-canals. The cells contain an abundance 

 of protein, some fat, and starch grains of various sizes. 

 The starch grains color blue with iodine, and the walls, 

 with chlor-iodine of zinc. — (McDonald Co., Missouri, Bush, 

 Mo. Bot. Card.) 



CAESALiPINIEAE — Bauhinieae. 



Cercis, L. 



Testa smooth and hard with strongly developed mucilagi- 

 nous endosperm. Systematic works indicate the presence of 

 endosperm. Schleiden and Vogel, and Chalon recorded it in 

 C. siliquastrum. The mucilaginous reserve cellulose of this 

 species was described by Nadelmann. Germination studies 

 were made by Lubbock and Tubeuf . 



Cercis canadensis, L. 



Pl.XVII.f.l-lh. 



Testa and endosperm laterally 664-670 /^ thick, toward the 

 edges only 290 ft. Testa 174 /x laterally, on the ends 207 /a 

 thick. Cotyledons narrow, 464 ft across. Chalon studied the 

 species with reference to endosperm. 



Malpighian. This layer nearly colorless ; the chromato- 

 phores occur in the upper part of the cell. Cuticle is an 

 even layer, followed by a narrow but well marked bright, 

 colorless, cuticularized zone ; the narrow upper light line 



