Bui. 108, Bureau of Chemistry, U. S. Dept. of Agriculture. 



PLATE VI. 





v 



v* 



* J 



FIG. 1. SLIME CELLS FROM SEED OF PLANTAOO 



ARI8TATA MlCHX. (X 75.) 



Fio. 2. ENDOSPERM CELLS OF SEED OF PLANTAGO 



ARI8TATA MlCHX. (X 150.) 



FK>. 3. EPIDERMAL LAYER OF SEED OF PLANTAGO 

 MAJOR L. (X 150.) 



FIG. 4. EPIDERMAL LAYER OF SEED OF PLANTAGO 



RUGELII DUCAISNE. (X 150.) 



FIG. 5. EPIDERMAL LAYER OF SEED COAT OF 

 SMARTWEED. (X 150.) 



FIG. 6. SEED COAT OF CURLED DOCK. 

 (X 150.) 



