194 Trans. Acad. Sci. of St. Louis. 



star-shaped, and thick -walled. Cells strikingly resemble 

 hyphae of fungi. These cells contain some protein. 



Endosperm. Sparingly developed, usually a single row of 

 cells, the aleurone layer, followed by thick-walled elongated 

 cells with a small lumen. Cells contain fat and protein. 



Eriihryo. Cells of the first row with thickened exterior 

 walls ; cells below more loosely arranged, larger than the 

 epidermal cells, and with intercellular spaces in the angles; 

 the cell-walls are thickened and connected with the adjoining 

 cells by conspicuous pore-canals. Cells contain an abundance 

 of protein, fat, and large starch grains with very evident 

 stratification. 



Phaseolus lunatus, L. 



Fl. XXI. f. 1-1 d. 



The testa of this species has been studied by Haberlandt and 

 Harz. Variable in thickness in the cultivated varieties, but 

 much thinner than in P. mullijiorus, 180-184 ix thick. Mal- 

 pighian cells 60-61 ix long ; cell-cavity wide at base and rather 

 abruptly narrowed; light line close under the cuticle. Osteo- 

 sclerids thick-walled, elongated, and somewhat funnel-shaped, 

 intercellular spaces round or elongated. Nutrient layer con- 

 sists of three to six rows of compressed cells, with vascular 

 elements in the lower part. Cells in the outer row of the 

 embryo are smaller; exterior walls thickened; cells below 

 larger and more loosely arranged, and elongated, with inter- 

 cellular spaces. The inner part of the cotyledon with paren- 

 chyma cells like the superior face. Cells of the cotyledons 

 contain a great deal of starch, the large grains generally with 

 longitudinal rifts. Also an abundance of protein and some 

 fat. 



Strophostyles, Ell. {Phaseolus, Kew Index. ) 



Testa variable, smooth or covered with hairs, otherwise 

 much as in Phaseolus. 



Strophostyles angulosa, Ell. (P. diversifolius, Pers. 

 Kew Index. S. helvola, L., Britton.) 

 PI. XXI. f. 4. 



Testa, including hairs, 332 fi thick. 

 Malpighian. Layer covered by a coat of brown hairs. 



