Note 146 — Chapter XI · ON BUD-VARIATION, AND ON CERTAIN ANOMALOUS MODES OF REPRODUCTION AND VARIATION.
Reading edition
‘Transact. Hort. Soc.,’ vol. v. pp. 65 and 68. See also Prof. Hildebrand, with a coloured figure, in ‘Bot. Zeitung,’ May 15th, 1868, p. 327. Puvis also has collected, ‘De La Dégénération,’ 1837, p. 36)several other instances; but it is not in all cases possible to distinguish between the direct action of foreign pollen and bud-variations.