3 Pages in Charles Darwin's Library associated with "flora - Viola palustris"

Das entdeckte Geheimnis der Natur im Bau und in der Befruchtung der Blumen.
By: Sprengel, Christian Konrad.
Publication info: Berlin :F. Vieweg,1793.
Pages: Page 397 Page 399
The regions of vegetation, being an analysis of the distribution of vegetable forms over the surface of the globe in connection with climate and physical agents.
By: Hinds, Richard Brinsley.
Publication info: London :G.J. Palmer,1843.
Pages: Page 58