[434] Schlechtendal, 'Bot. Zeit.,' xx, 1862, p. 301.

[435] 'Phil. Bot.,' § 126.

[436] C. Morren, 'Bull. Acad. Belg.,' xix, part ii, p. 17.

[437] 'Seemann's Journal of Botany,' iii, p. 354.

[438] On this point the reader will find an excellent summary in Lindley's 'Vegetable Kingdom,' cd. iii, p. 183a, and in Darwin, 'Fertilisation of Orchids,' p. 292. See also Crüger,'Journ. Linn. Soc.,' t. viii, p. 134.

[439] 'Seemann's Journal of Botany,' vol. iv, p. 168, tab. 47.

[440] Ibid., t. iv. 1866, p. 168, t. xlvii, f. 1.

[441] 'Bildungsabweich,' p. 8; see also 'Bot. Zeit.,' 1852, p. 425.

[442] 'Journ. Linn. Soc.,' t. ii, p. 104. tab. 1, fig. B.

[443] Lindl., "Orchid. Ind.," 'Jour. Linn. Soc.,' iii, p. 9.