Plants, especially trees, continue to hold an important interest for the Waodani. Their store of botanical knowledge is extensive, ranging from knowledge of materials to poisons to hallucinogens to medicines. They also relate plants to their own experiences, particularly that of growing. Among trees, certain kinds are auspicious. Canopy trees, with their distinctly colored young leaves and striking transformation as they mature to towering giants, are "admired for their solitary character... as well as for their profuse entanglement" with other plants. Other significant trees are the pioneer species of the peach palm (used for making spears and blowguns, as well as for fruit), and fast-growing balsa wood, used for ceremonial purposes. Peach palm trees are associated with past settlements and the ancestors who live there.