[637] 'Nova Acta, St. Petersburg,' 1794, p. 378; 1795, pp. 307, 313, 316; 1787, p. 407.
[638] 'De la Fécondation,' 1862, p. 311.
[639] 'Amaryllidaceæ,' 1837, p. 362.
[640] Abstracted in 'Gard. Chronicle,' 1860, p. 1081.
[641] This was the opinion of the elder De Candolle, as quoted in 'Dic. Class. d'Hist. Nat.,' tom. viii. p. 405. Puvis, in his work, 'De la Dégénération,' 1837, p. 37, has discussed this same point.
[642] 'Comptes Rendus,' Novembre 21, 1864, p. 838.
[643] 'Nova Acta, St. Petersburg,' 1794, p. 391.
[644] 'Bastarderzeugung,' s. 507, 516, 572.
[645] 'Die Bastardbefruchtung,' &c., 1865, s. 24.
[646] 'Bastarderzeugung,' s. 452, 507.