[45] Cohn’s Beiträge, 1894.
[47] Pfeffer, in the Annals of Botany, September 1894. Further details in Czapek’s paper in Pringsheim’s Jahrb., 1895.
[48] F. Darwin, Annals of Botany, December 1899.
[51a] Life and Habit, 1878.
[51b] Butler’s term.
[53a] See James Ward, Naturalism and Agnosticism, i. 283
[53b] Science and Culture, Collected Essays, i.
[53c] Loc. cit. p. 288.
[56] Strictly speaking—florets.
[58a] C. Darwin. Climbing Plants.