BUDS AND BRANCHING. 



cSl 



ig- 53- A thorny branch. 



Hairs grow from, 

 and belong entirely 

 to the skin of plants. 

 They are found in 

 many different forms 

 clavate * or club- 

 shaped, uncinate * or 

 hooked, capitate * or 

 knobbed, etc. When 

 they are stiff and 

 sharp like a bristle, 

 they are called seta ; 



after. Now you can remember 

 that tJiorns are the wood of the 

 stem, whilst prickles arc- 

 growths from the more exter- 

 nal parts of the stem, and 

 easily break off. Thorns too 

 grow in a regular order like 

 branches do ; but prickles 

 grow here and there irregularly. 



Fig. 54. -Hairs on* young part of a 

 plant (magnified 100 times). l> Glandu- 

 lar hair, c e /early stages of growth. 



* From the Latin " clara" a club; " unct-ts," a hook; 

 head ; "seta," a bristle. 



