330 CEREAL PLANTS. Chap. IX. 



high authority writes in 1855,'* " We ourselves have no hesitation 

 in stating our conviction, as the result of all the most reliable 

 evidence, that none of these Cerealia exist, or have existed, truly 

 wild in their present state, but that all are cultivated varieties 

 of species now growing in great abundance in S. Europe or W. Asia." 

 On the other liaml, Alph. De Candollo-" has addnced abundant 

 evidence that common wheat {Tnticum vulgare) has been found 

 wild in various parts of Asia, where it is not likely to have escaped 

 from cultivation : and there is some force in M. Godron's remark, 

 that, supposing these plants to be escaped seedlings,'-' as they have 

 propagated themselves in a wild state for several generations, their 

 continued resemblance to cultivated wheat renders it probable that 

 the latter has retained its aboriginal character. But the strong 

 tendency to inheritance, which most of the varieties of wheat evince, 

 as we shall presently see, is here greatly undervalued. Much 

 weight must also be attribi;ted to a remark by Professor Hilde- 

 brand,^^ that when the seeds or fruit of cultivated plants possess 

 qualities disadvantageous to them as a means of distribution, we may 

 feel almost sure that they no longer retain their aboriginal condition. 

 On the other hand, M. De Candolle insists strongly on the frequent 

 occurrence in the Austrian dominions of rye and of one kind of oats 

 in an apparently wild condition. With the exception of these two 

 cases, which however are rather doubtful, and with the exception of 

 two forms of wheat and one of barley, which he believes to have been 

 found truly wild, M. De Candolle does not seem fully satistied with 

 the other reported discoveries of the parent-forms of our other 

 cereals. With respect to oats, according to Mr. Buckmann,-^ the 

 wild English Avana fatua can be converted by a few years of careful 

 cultivation and selection into forms almost identical with two very 

 distinct cultivated races. The whole subject of the origin and 

 specific distinctness of the various cereal plants is a most dithcult 

 one ; but we shall perhaps be able to judge a little better after con- 

 sidering the amount of variation which wheat has undergone. 

 Metzger describes seven species of wheat, Godron refers to five, 



'" Mr. Bentham, in his review, (torn. i. p. lt>5) has shown by careful 



entitled ' Hist. Notes on cultivated experiments that the first step in the 



Plants,' by Dr. A. Targioni-Tozzetti, series, viz. JEgilops triticoides, is a 



in 'Journal of Hort. Soc.,' vol. ix. hybrid between wheat and yE'. ovata. 



(1855), p. 133. He informs me that The frequency with which these 



he still retains the same opinion. hybrids spontaneously arise, and the 



^" ' Geograph. Bot.,' p. 928. The gradual manner in which the jE. 



whole subject is discussed with admir- triticoides becomes converted into true 



able fulness and knowledge. wheat, alone leave any doubt with 



^' Godron, ' De I'Espfece,' torn. ii. p. respect to M. Godron's conclusions. 



72. A few years ago the excellent, ^'^ 'Die Verbreitungsmittel der 



though misinterpreted, observations Ptlanzen, 1873, p. 129. 



of M. Fabre led many persons to -^ Report to British Association fol 



believe that wheat was a modified 1857, p. 207. 

 descendant of zEgilops ; but M. Goii .-on 



