The World and the University 



the pea is a weak, clinging, straggling herb, 

 and the locust a big, thorny hardwood tree?" 

 "Yes, that is true," he replied, "as to the 

 difference in size, but it is also true that in all 

 their essential characters they are alike, and 

 therefore they must belong to one and the same 

 family. Just look at the peculiar form of the 

 locust flower; you see that the upper petal, 

 called the banner, is broad and erect, and so is 

 the upper petal of the pea flower; the two lower 

 petals, called the wings, are outspread and wing- 

 shaped; so are those of the pea; and the two 

 petals below the wings are united on their 

 edges, curve upward, and form what is called 

 the keel, and so you see are the corresponding 

 petals of the pea flower. And now look at the 

 stamens and pistils. You see that nine of the 

 ten stamens have their filaments united into a 

 sheath around the pistil, but the tenth stamen 

 has its filament free. These are very marked 

 characters, are they not? And, strange to say, 

 you will find them the same in the tree and in 

 the vine. Now look at the ovules or seeds of 

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