[18] See A. De Candolle, ‘Géograph. Bot.,’ 1855, p. 928 et seq. Godron, ‘De l’Espèce,’ 1859, tom. ii. p. 70; and Metzger, ‘Die Getreidearten,’ etc., 1841.
[19] Mr. Bentham, in his review, entitled ‘Hist. Notes on cultivated Plants,’ by Dr. A. Targioni-Tozzetti, in ‘Journal of Hort. Soc.,’ vol. ix., 1855, p. 133. He informs me that he still retains the same opinion.
[20] ‘Géograph. Bot.,’ p. 928. The whole subject is discussed with admirable fulness and knowledge.
[21] Godron, ‘De l’Espèce,’ tom. ii. p. 72. A few years ago the excellent, though misinterpreted, observations of M. Fabre led many persons to believe that wheat was a modified descendant of Ægilops; but M. Godron (tom. i. p. 165) has shown by careful experiments that the first step in the series, viz. Ægilops triticoides, is a hybrid between wheat and Æ. ovata. The frequency with which these hybrids spontaneously arise, and the gradual manner in which the Æ. triticoides becomes converted into true wheat, alone leave any doubt with respect to M. Godron’s conclusions.
[22] ‘Die Verbreitungsmittel der Pflanzen,’ 1873, p. 129.
[23] Report to British Association for 1857, p. 207.
[24] ‘Considérations sur les Céréales,’ 1842-43, p. 29.
[25] ‘Travels in the Himalayan Provinces,’ etc., 1841, vol. i. p. 224.
[26] Col. J. Le Couteur on the ‘Varieties of Wheat,’ pp. 23, 79.
[27] Loiseleur-Deslongchamps, ‘Consid. sur les Céréales,’ p. 11.