[48] Sir R. Schomburgk, ‘Proc. Linn. Soc. Bot.,’ vol. ii. p. 132.
[49] ‘Gardener’s Chronicle,’ 1862, p. 619.
[50] Hopkirk’s ‘Flora Anomala,’ 167.
[51] ‘Sur La Production et la Fixation des Variétés,’ 1865, p. 4.
[52] ‘Journal of Horticulture,’ March, 1865, p. 233.
[53] ‘Gardener’s Chronicle,’ 1843, p. 135.
[54] Ibid., 1842, p. 55.
[55] ‘Gardener’s Chronicle,’ 1867, p. 235.
[56] Gärtner ‘Bastarderzeugung,’ s. 305.
[57] Mr. D. Beaton, in ‘Cottage Gardener,’ 1860, p. 250.