PART III. 



Summary and Conclusion. 



CHAPTER I. 



GENEEAL TABLE OF SPECIES, WITH THEIR ORIGIN AND 

 THE EPOCH OF THEIR EARLIEST CULTIVATION. 



The following table includes a few species of which a 

 detailed account has not been given, because their origin 

 is well known, and they are of little importance. 



Explanation of the signs used in the table : (1) 

 annual, (2) biennial, ?: perennial, 5 small shrub, S shrub, 

 5 small tree, 3 tree. The letters indicate the certain 

 or probable date of earliest cultivation. For the species 

 of the old world : A, a species cultivated for more than 

 four thousand years (according to ancient historians, the 

 monuments of ancient Egypt, Chinese works, and botanical 

 and philological indications) ; B, cultivated for more than 

 two thousand years (indicated in Theophrastus, found 

 among lacustrine remains, or presenting various signs, such 

 as possessing Hebrew or Sanskrit names) ; C, cultivated for 

 less than two thousand years (mentioned by Dioscorides 

 and not by Theophrastus, seen in the frescoes at Pompeii, 

 introduced at a known date, etc.). For American species : 

 D, cultivation very ancient in America (from its wide 

 area and number of varieties); E, species cultivated 

 before the discovery of America, without showing signs 

 of a great antiquity of culture ; F, species only cultivated 

 since the discovery of America. 



