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84 



FLOWERING PLANTS 



Roots. 





A . Draw a single mustard seedling under the dissecting microscope to shew the numerous root-hairs. Notice 

 that the hairs are shorter towards the root apex. 



B. Mount the root of the seedling in water, and flatten it out under a coverslip. Draw some root-hairs 

 to illustrate their origin from single superficial cells. 



C. Examine the fresh Bean root, observe the root-cap at the growing point and the four or more longitudinal 

 rows of lateral roots. Cut the root across and make out with a lens the endogenous origin of the lateral roots. 



D. Separate the cortex of the root from the stele by twisting the root to break the cortex and pulling it off 

 like a sheath. 





