LEGUMINOSM. 



269 



How does seed distribution come about in such plants as the strawberry? 

 How are strawberry plants usually propagated? 



Materials. Entire plants with runners : flowers ; fruit. 



Exercise 77. 



431. The apple (Pyrus malus). 



Leaves. Determine the arrangement of the leaves on the shoot ; sketch a 

 leaf. 



The inflorescence. Determine the kind of inflorescence. 



The flower. Study several flowers to compare the variation in the number 

 of the parts or members of the flower. What parts of the flower are present ? 



Make a long section of the flower and sketch showing the parts and their 

 relation to each other. 



Determine the number of members in each set ; the relation of the members 

 of a set to each other ; the relation of the sets among themselves. Give the 

 names which are applied to these relations. 



The fruit. What parts of the flower are united in the fruit? Make 

 longitudinal and cross-sections of an apple, name the parts and show from 

 which part of the flower each part of the fruit comes. What is the fruit of an 

 apple-tree called ? 



Materials. Spray of leaves and flowers ; mature fruit. 



ORDER LEGUMINOS/E. 



432. Lesson XIV. The pea family (papilionaceae). This 

 family is well represented by the common pea. The flower is 

 butterfly-like or papilionaceous, and the showy part is made up 



Fig. 231. 



Details of pea flower ; section of flower, perianth removed to show the diadelphous 

 tamens, one single one, and nine in the other group. (From Warming.) 



