Cactus

Cactus (pleura Cacti) grow in Kharidian Desert.

By using a knife to certain cactus, it will fill one dose in a waterskin.

A cactus can also be grown with the Farming skill at the one cactus patch in Al-Karid. Its cactus spine is used to pay a farmer to take care of growing a yew tree and is an ingredient in Herblore for making Extra strong weapon poison.