ILLUSTRATIONS. 



PLATES. 



Page. 



PLATE I. Fig. 1. Hard-shelled almond. Hair-like cells of integument (X75). 

 Fig. 2. Hard-shelled almond. Surface of integument (X75). 

 Fig. 3. Hard-shelled almond. Aleurone layer (X150). Fig. 4. 

 Hard-shelled almond. Epidermis of cotyledon (X175). Fig. 5. 



Peach kernel. Surface of integument (X 75) 12 



II. Fig. 1. Prune. Section at surface of kernel (X175). Fig. 2. 

 Prune. Surface of integument (X 75). Fig. 3. Apricot. Surface 

 of integument (X75). Fig. 4. Filbert. Section at surface of 

 kernel ( X 175). Fig. 5. Filbert. Surface of integument ( X 175) . . 12 



III. Fig. 1. Pine nut. Surface of integument (X75). Fig. 2. Brazil 



nut. Section at surface of kernel, not including the integument 

 (X75). Fig. 3. Canarium. Surface of integument (X175). . 

 Fig. 4. Canarium. Stellate parenchyma cells (X175). Fig. 5. 

 Canarium. Endodermis of seed coat (X 350) 28 



IV. Pistachio nut. Fig. 1. Surface of integument (X175). Fig. 2. 



Section at surface of kernel (X75). Fig. 3. Endodermis of seed 

 coat (X350). Fig. 4. Epidermis of cotyledon (X175). Fig. 5. 



Sclerenchyma cells from seed coat (X175) 32 



V. Cashew nut. Fig. 1. Surface view of epicarp (X175). Fig. 2. 

 Surface view of endocarp (X175). Fig. 3. Section of epicarp 

 (X175). Fig. 4. Section of endocarp (X75). Fig. 5. Irregularly- 

 shaped cells from sinus of nut (X350). Fig. 6. Starch (X400). . . 32 



TEXT FIGURES. 



FIG. 1. Kernels (natural size) of (A) Hard-shelled almond, (B) Jordan almond, 



(C) Apricot, (D) Peach, (E) Prune 7 



2. Persian walnut: A, Epidermis of integument (X175); B, Section of 



integument and superficial tissues of kernel ( X 175) 16 



3. Butternut: A, Epidermis of integument (X175); B, Section of integu- 



ment and superficial tissues of kernel (X175) 18 



4. Black walnut: A, Epidermis of integument showing opalescent charac- 



ter of cell contents (X175); B, Section of integument and superficial 

 tissues of kernel (X175) 19 



5. A, Japanese walnut (natural size); B, California black walnut (natural 



size) 20 



6. Japanese walnut: A, Epidermis of integument showing coiled guard 



cells (X175); B, Section of integument and superficial tissues of 

 kernel (X175) 21 



7. California black walnut: A, Epidermis of integument showing coiled 



guard cells (X175); B, Section of integument and superficial tissues 



of kernel (X175) 22 



8. Pecan: A, Epidermis of integument showing elongated cells (X175); 



B, Section of integument and superficial tissues of kernel ( X 175) 25 



9. Hickory nut: A, Epidermis of integument showing nearly isodiametric 



cells (X175); B,. Section of integument and superficial tissues of 



kernel (X175) 26 



10. Cashew nut 32 



4 



