EXOGENS OR DICOTYLEDONS 



evening primrose, or fuchsia, family. Find them if you can; 

 Fig. 69, Chapter XV, will help you. Try to find out for 

 yourselves, before you read about them, some of their de- 

 vices for pollination. 



There are many interesting foreign families that belong 

 to this group, and we can cultivate some of the plants in 

 our climate. Some of these foreigners are: the passion- 

 flower vine and begonias from tropical America, the crape- 

 myrtle and pomegranate from India, the grevillea and 

 Eucalyptus from Australia, guavas from Brazil and West 

 Indies; also the trees that produce cloves and allspice, 

 growing only in the tropics, and the Brazil-nut tree in 

 South America. You can find the flowers or fruits of 

 many of these; notice the ovaries especially. Cloves are 

 dried flower buds; allspice consists of dried berries. The 

 Brazil-nuts are, of course, seeds; do you know how they 

 are packed away in fruits that look like cannon balls ? You 

 can sometimes see them at fruit or grocery stores. 



Two other families of this group are the rose and the 

 pea families, whose members are widely scattered and very 

 well known because of their use or beauty. The rose 

 family includes, besides all kinds of roses, many of our 

 cultivated fruits: apples, pears and quinces, which belong to 

 the same branch; peaches, plums, cherries and all the other 

 stone fruits; and strawberries, blackberries, raspberries and 

 the like. Collect as many of the flowers and fruits of these as 

 you can, taking either wild or single roses, double roses, 

 however beautiful, are not natural. Now try to make out 

 family traits. It is easy to make a general statement about 

 sepals, petals and stamens, but there are many kinds of pistils. 

 One branch of the family has inferior ovaries; the fruits will 

 show the withered remnants of the rest of the flower above 

 the ovaries and the surrounding calyx and receptacle. 

 How many ovaries are there in each fruit ? What part of 

 the flower do we eat, and what do we throw away ? An- 



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