A Dead Bush is a naturally occurring Doodad which can only spawn on Sand. The player can harvest the Dead Bush using either bare hands or any Tool. Harvesting the Dead Bush uses the Botany skill and provides Twigs, A Branch and Plant Roots. It cannot be placed by the player.
Deadbush cacti ingame

An image showing a Dead Bush in-game and a nearby Cacti

The Dead Bush will leave behind the item Charcoal when burned.