28 SUDS 



/ 



growing point ; a mode of protection quite perfectly 



represented, also, by the Castor Bean plant (Fig. 16). 

 In the Mullein, protection is assured both in the growing 



14. End of the stem, and two nas- 

 cent leaves, in Coleus, after 

 removal of several pairs of 

 the leaves of the growing 

 bud. 



15. Protection of the growing bud of 

 Begonia. 



season and in winter by a thick, woolly covering of plant 

 hairs, or trichomes. These are produced by all the leaves 

 in their earliest stages when crowded together in the bud, 



16. Protection of the terminal bud in the Castor Bean. 



and persist when the leaves are mature. The tender 

 sprouts of many plants are well supplied with trichomes 

 of a special kind, secreting distasteful liquids which dis- 

 courage the attacks of herbivorous insects. 



