lonj^er 1 han ?iai rs on the other jiarts of the plant. 

 As thoy f^i-ow oilier all the hairs acquire thick cell- 

 walls and each hair cell tends to strair;hten. In 

 their mature state they function as a protection 

 af:ainst moisture. This f\inction they perform by means 

 of a waxy covering which repels w^ter, so that it is 

 very difficult to moisten a young flower bud, or a 

 growing twig or fruit. But if these hair-covered parts 

 be soaked a short time in strong alcohol, and allowed 

 to become dry again, they may be very readily moisten- 

 ed. 



Pollen— Sacs and Pollen - 



Each fertile stamen rudiment early begins to form 

 two pollen-sacs. There is apparently no evidence of 

 the presence at any stage of the other two microsporan- 

 gia which are usually found in Angiosperms. The ster- 

 ile I'udiments which develope into nectaries do not make 

 a beginning at pollen formation. 



The first evidence of the fonnation of arche- 



