Figure 4

Area of stem bark extracted from Stryphnodendron rotundifolium Mart. specimens from a region of Cerrado (Brazilian Savanna), Araripe National Forest (Floresta Nacional do Araripe, Ceará, Northeastern Brazil) distributed in diameter classes with 4-cm intervals: 1 (0–4 cm); 2 (4.1- 8 cm); 3 (8.1-12); 4 (12.1-16); 5 (16.1-20); 6 (20.1-24). Study site within the forest.