Trees of paradise: Exquisite illustrations of the tropical palm.This encyclopedic treasury of 240 exquisite chromolithographic illustrations was based on Martius's expeditions through Brazil and Peru. From 1817 to 1820, he traveled over 2,250 km (1,400 miles) through the Amazon basin to investigate natural history and native tribes with zoologist Johann Baptist von Spix.Martius's folio is unusual in its inclusion of cross-sectioned diagrams, conveying the architecture of these mighty trees, which central Europeans would have found hard to imagine accurately. Equally remarkable are the color landscapes showing various palms—often standing alone in simple and elegant beauty.