[903] See on this head, Naudin, idem, p. 141.
[904] The statement is believed by Dr. Lindley in 'Gard. Chron.,' 1857, pp. 382, 400.
[905] Braun, in 'Bot. Mem. Ray Soc.,' 1853, p. xxiii.
[906] This hybrid has never been described. It is exactly intermediate in foliage, time of flowering, dark striæ at the base of the standard petal, hairiness of the ovarium, and in almost every other character, between C. laburnum and alpinus; but it approaches the former species more nearly in colour, and exceeds it in the length of the racemes. We have before seen that 20.3 per cent. of its pollen-grains are ill-formed and worthless. My plant, though growing not above thirty or forty yards from both parent-species, during some seasons yielded no good seeds; but in 1866 it was unusually fertile, and its long racemes produced from one to occasionally even four pods. Many of the pods contained no good seeds, but generally they contained a single apparently good seed, sometimes two, and in one case three seeds. Some of the seeds germinated.
[907] 'Annales de la Soc. de Hort. de Paris,' tom. vii., 1830, p. 93.
[908] 'Annals and Mag. of Nat. Hist.,' March, 1848.
[909] 'Pomologie Physiolog.,' 1830, p. 126.
[910] Gallesio, 'Gli Agrumi dei Giard. Bot. Agrar. di Firenze,' 1839, p. 11. In his 'Traité du Citrus,' 1811, p. 146, he speaks as if the compound fruit consisted in part of lemons, but this apparently was a mistake.
[911] 'Gard. Chron.,' 1855, p. 628. See also Prof. Caspary, in 'Transact. Hort. Congress of Amsterdam,' 1865.
[912] 'Gard. Chron.,' 1851, p. 406.