Concept: - Plants that are adapted to dry tropical regions have the C4 pathway. - C4 plants have a special type of leaf anatomy, they tolerate higher temperatures, they show a response to high light intensities, they lack a process called photorespiration, and have greater productivity of biomass. - Large cells around the vascular bundles of the C4 plants are called bundle sheath cells. - Leaves that have such anatomy are said to have 'Kranz' anatomy.