16 



Root — 



Fig. 5. Long. Section of root of Bnaii plant — 



rCentral fibro-vascular limnUe, surrounderl by cortical paTcncliynia 

 and epidermis. 



Root ■{ Epidermis, one layer thick ; at tip of root split into several layers 



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

 I. a root). 



r Appendages of the root developed endogenously (Gr. endun, witliin ; 

 Eootlets ....-< gennao, I produce), and repeating tlie structure of the main 



( root. 



Leap — 



li'iG. G. The Stalk or Petiole of Horse Chestnut leaf— 

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

 Fig. 7. The Leaf Blade or Lamina of the Cherry Laurel — 



(Upper epidermis, colourless, a single layer, with the outer walls 

 J thickened forming cuticle. 



I Lower epidermis, like upper epidermis, but stomata more 

 L abundant. 

 GnoDND OR Coetical f 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 i^toma. 



CLASSIFICATION OF PEA OR BEAN PLANT. 



Suh-Kingdom — Phanerogamia, because the sexual organs are conspicuons (Gr. phaneros, visible 



gamos, sexual nnion). 

 Class — Dicotyledon — 



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 — Leguminosee, distinguished by the arrangement of the corolla leaves, and iho fruit a pod 



or legume. 

 Genera — Pisum (pea), Vicia (bean). 



