EPIDERMIS . . . . *\ -, 



16 



ROOT 



FIG. 5. LONG. SECTION of root of Bean plant 



'Central fibro-vascular bundle, surrounded by cortical parenchyma 

 and epidermis. 



ROOT -^ Epidermis, one layer thick ; at tip of root split into several layers 



forming the root-cap or pileorhiza (L. pileus, a cap ; Gr. rhiza, 

 a root). 



c Appendages of the root developed endogenously (Gr. endon, within ; 

 EOOTLETS . . . . < gennao, I produce), and repeating the structure of the main 



( root. 

 LEAP 



FIG. G. The STALK or PETIOLE of ITorse Chestnut leaf 

 Repeats the characters of the one-year-old stem. 

 FIG. 7. The LEAF BLADE or LAMINA of the Cherry Laurel 



Clipper epidermis, colourless, a single layer, with the outer walls 



thickened forming cuticle. 



Lower epidermis, like upper epidermis, but stomata moro 

 L abundant. 

 GROUND OR COETICAL J Palisade tissue. 



PARENCHYMA . . . ( Loose tissue with less chlorophyll 

 Fibro-vascular bundles, forming veins. 

 FIG. 8. EPIDERMIS of HYACINTH 



Stoma, the opening (Gr. stoma, a mouth). 

 Guard-cells (red), two surrounding each stoma. 



CLASSIFICATION OF PEA OR BEAN PLANT. 



Sub-Kingdom Phanerogamia, because the sexual organs are conspicuous (Gr. phaneros, visible 



gamos, sexual union). 

 Class D icotyledon 



The young plant has two cotyledons (PI. VII. fig. 4). 



The fibro-vascular bundles form a ring round the pith (PI. VIII. diag.). 



Leaf has reticulated venation. 



Flower leaves arranged in fives (PI. VI. fig. 9). 

 Order Leguminosse, distinguished by the arrangement of the corolla leaves, and the fruit a pod 



or legume. 

 Genera Pisuin (pea), Vicia (bean). 



