THE FLOWERING PLANTS. 



33 



FIG. 11. Transverse section of stem 

 of Scotch Fir at close of second 

 year's growth. (X 35.) 



Angiosperm, roughly trans- 

 lated, means seed in a ves- 

 sel. Gymnosperm means 

 naked seed. 



The thick leaves that bear 

 the ovules are called the 

 carpels. Where on them 

 are the ovules borne? Is 

 the shape of the pistillate 

 flower adapted to catch pol- 

 len that is being borne 

 about by the wind? Do 

 you think that either the 

 staminate or pistillate flower 

 would attract insects because of its color or odor ? 



The fertilized ovules mature into seeds in the autumn 

 of the second year. Secure some of the ripened cones 



before the seeds have 

 dropped out. Draw one 

 of the seeds. What do 

 you think is the use of 

 the winglike appendage 

 on the seed? 



6. Cut across a Pine 

 shoot of the present sea- 

 son's growth. If the 

 material has been in al- 

 cohol long enough to 

 dissolve out the pitch, 

 it will be pleasanter to 



FIG. 12. - Part of transverse section of stem handle. Compare the 

 of White Pine during second year's arrangement of the pith, 

 growth. (X 35.) A, pith; B, wood of 

 first year's growth ; C, wood of the sec- 



B 



wood, and bark with 



ond year in process of formation ; D, the the stem of an AnglO- 



cambium layer where the new growth 



originates ; E, the bark ; F, pitch ducts, sperm. Counting the 



CLARK'S BOX. 3 



