ELEMENTARY BOTANY 



103 



LIST OF ALL KNOWN PLANTS 1 



How many plants were there in the longest list ? 



As we found with animals, so with plants we can hope 

 to learn even the names of only a small number, and we 

 must select these, as we do our friends, with great care. 

 There are some that we meet ^very day, so common that 

 we ought to know them. Others are so beautiful or fra- 

 grant that we would go far to visit them. 



1 I am indebted for these estimates to Prof. George E. Stone, Amherst, 

 Mass. 



2 Saccardo's estimate. 



