One of the best-marked illustrations of these changes occurs in a permanent malformation of Epilobium hirsutum, specimens of which were originally obtained from the late Professor Henslow. The several floral parts are here, some virescent, others truly foliaceous, and each whorl is separated from its neighbour by a rather long internode. In Fuchsia and Campanula a like change may occasionally be observed.
Engelmann, in addition to those previously mentioned, cites the following plants as having manifested this change:
*Convallaria majalis!, *Tulipa Gesneriana!, Veronica Chamædrys, Orobanche gracilis, Solanum Lycopersicum, Gentiana campestris, Hypericum, Helleborus fetidus, Caltha palustris, Brassica oleracea! and many Rosaceæ, Caryophylleæ, Cruciferæ, and Ranunculaceæ. (See Dialysis, Median Prolification, &c.)
Apostasis of the sub-floral or involucral leaves is not of infrequent occurrence in malformations affecting Compositæ and Umbelliferæ. In the following genera it has been observed with especial frequency:—Torilis Anthriscus, Eryngium, Athamanta Cervaria, Leontodon, Tragopogon pratense!, Wedelia perfoliata! In garden anemones, also, it is a common deviation.
FOOTNOTES:
[510] 'Cat. Plant.,' Lang., p. 113.
[511] 'Bull. Soc. Bot. France,' t. i, 1854, p. 173, and t. xiii, p. 96.
[512] 'Abhandl. Math. Phys. Class.,' Band. iv, Abhandl. i, tab. i.
[513] See Cramer, 'Bildungsabweich,' pp. 62–79, and Fleischer, 'Missbild, der Culturpflanzen.'
[514] Schlechtendal, 'Bot. Zeit.,' 1844, p. 457; 'Linnæa,' xi, p. 301, xiv, p. 363; 'Bot. Zeit.,' 1856, p. 72; Masters, 'Rep. Brit. Assoc.,' Manchester, 1861; Coultas, 'What may be learnt from a tree,' p. 118.