[37] See also Prillieux, 'Bull. Soc. Bot. Fr.,' 1861, p. 195.
[38] 'Mém. Acad. Toulouse,' 5th Series, vol. iii.
[39] Linnæa, vol. ii. p. 607.
[40] 'Journal Roy. Hort. Soc.,' new ser., vol. i. 1866, p. 200.
[41] 'Bull. Soc. Bot. Fr.,' 1861, p. 159.
[42] Ibid., 1859, p. 467.
[43] 'Flora,' 1858, p. 65, tab. ii.
[44] C. Morren. 'Bull. Acad. Belg.,' vol. xv (Fuchsia, p. 89); vol. xviii, p. 591. (Lobelia, p. 142); vol. xix, p. 352; vol. xx, p. 4.
[45] 'Bull. Soc. Bot. Fr.,' vol. vii, p. 625.
[46] Cramer, 'Bildungsabweichungen,' p. 56, tab. vii, fig. 10, figures a case wherein the two central flowers of the capitulum of Centaurea Jacea were united together.