The book of palms:

On December 15, 1868, Carl Friedrich Philipp von Martius (1794-1868), Professor of Botany at the University of Munich and director of the Royal Botanic Garden, was carried to his grave in a coffin covered with fresh palm leaves. The fronds were a reference to his groundbreaking Natural History of Palms: a work in three volumes, published between 1823 and 1853.