Landkarte "Carte Phytostatique de L'Ile de Ténériffe" (Teneriffa-Spanien) Bertelot, 1835
A map dividing Tenerife into six zones affecting the type of plants that could grow in each, published in 'L'Histoire Naturelle des Îles Canaries' (1835-50), written by Frenchman Sabin Berthelot and English botanist Philip Barker-Webb.