Plant stem stems are asparagus, bamboo shoots, cactus pads or nopalitos, kohlrabi, and water chestnut. The spice, cinnamon is bark from a tree trunk. Gum arabic is an important food additive obtained from the trunks of "Acacia senegal" trees. Chicle, the main ingredient in chewing gum, is obtained from trunks of the chicle tree. Medicines obtained from stems include quinine from the bark of cinchona trees, camphor distilled from wood of a tree in the same genus that provides cinnamon, and the muscle relaxant curare from the bark of tropical vines. Wood is used in thousands of ways, e.g. buildings, furniture, boats,
Jesuit's bark in the Jesuit College at Rome, who undoubtedly deserves the greatest credit after de Lugo for distributing the genuine unadulterated article, and to whom are attributed the Roman directions for its use "Schedula Romana", the earliest dating at least from 1651. In his friend Honoré Fabri, a French Jesuit, who stayed for a time in Rome, de Lugo won a determined defender of the bark against the first anticinchona pamphlet written by the Brussels doctor Jean-Jacques Chifflet. Under the pseudonym of Antimus Conygius, Fabri wrote in 1655 the first paper on cinchona published in Italy, as well as the first