252 PLANT FAMILIES: DICOTYLEDONS. 



Material. — Shoots of the willow, some with leaves, some with the catkins 

 (the two kinds of catkins occur on different plants). If material cannot be 

 obtained fresh when wanted for study, the leafy shoots may be preserved dry, 

 and the catkins in alcohol or formalin, or dry. Ripe fruit should also be at 

 hand ; this may be preserved dry. 



Order AmentiferjE. 



409. Lesson V. The oak family (cupuliferse). — A small 

 branch of the red oak (Quercus rubra) is illustrated in fig. 218. 



Fig. 218. 

 Spray of oak leaves and flowers. Below at right is staminate flower, at left pistillate 

 flower. 



This is one of the rarer oaks, and is difficult for the beginner 

 to distinguish from the scarlet oak. The white oak is perhaps 



