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. 



Osieosclerids . The thick-walled I-shaped cells 19-20 ^ 

 long. Contents of cells and walls are browti 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.) 



CAESALPINIEAE — 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 

 G . 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. I -lb. 



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

 edges only 290 /x. Testa 174 fi laterally, on the ends 207 /u, 

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

 species with reference to endosperm. 



Maljnghian. 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 



