beautiful adaptations as can be found in any part of the kingdom of
nature. It is, also, an interesting fact that intermediate states
between organs fitted for widely different functions, may be observed
on the same individual plant of Corydalis claviculata and the common
vine; and these cases illustrate in a striking manner the principle
of the gradual evolution of species.



APPENDIX TO PREFACE (1882).



Since the publication of this Edition two papers by eminent botanists
have appeared; Schwendener, 'Das Winden der Pflanzen' (Monatsberichte
der Berliner Akademie, Dec. 1881), and J. Sachs, 'Notiz uber
Schlingpflanzen' (Arbeiten des botanischen Instituts in Wurzburg, Bd.
ii. p. 719, 1882). The view "that the capacity of revolving, on
which most climbers depend, is inherent, though undeveloped, in
almost every plant in the vegetable kingdom" ('Climbing Plants,' p.
205), has been confirmed by the observations on circumnutation since
given in 'The Power of Movement in Plants.'



ERRATA.



On pp. 28, 32, 40, 53, statements are made with reference to the