They are a species-rich group with highest diversity in the tropical and subtropical mountains, especially the Andes.

Cloud forest formerly covered much of the tropical mountain and coastal areas of the world.

Members of the Scrophulariaceae have a cosmopolitan distribution, with the majority found in temperate areas, including tropical mountains.

The climate is typical of tropical mountains with clearly delineated wet and dry seasons.

Its natural habitat is subtropical or tropical moist mountains.

I got tired of being stuck up there on that tropical mountain.

The genus is widespread in temperate regions and on tropical mountains.

"Biological response to climate change on a tropical mountain."

Its natural habitats are subtropical or tropical moist mountains and rivers.

It is remarkable, however, that plants of similar habit are also found on tropical high mountains elsewhere.