APPLSS AND THJSIB LIKE 



289 



collections cannot be made. The dry fruits may be preserved in 

 glass jars, and the soft ones in alcohol diluted two to three times 

 with water. Acorns are among the best fruits to study in a com- 

 parative way, because the kinds of oaks are many, the acorns them- 

 selves are variable, they keep indefinitely (if kept away from 

 insects), and are pleasant to handle. Good hand-books to aid in 

 the study of forest trees are, Apgar's "Trees of the Northern United 

 States," Mathews' "Familiar Trees and Their Leaves," and Newhall's 

 "Trees of Northeastern America," all profusely illustrated. 



LV. APPLES AND THEIR LIKE 



ev 



r-. 



340. Consider the pictures of the apple flower, 

 Fig. 139. Tlie styles are five, showing that the 

 pistil is compound. The ovules are attached near 

 the base of the locules. The petals and stamens 

 are apparently attached to the 

 calyx -cup. The ovary seems to 

 be wholly inferior. 



341. Look at the developing 

 apples, in Fig. 

 46. The styles 

 and stamens 

 persist at the 

 top of the fruit; 

 and so do the 

 sepals. 



Pig. 297. o42. A ma- 



The leaf on the apple. tUrC apple iS 



