The vegetation area found uphill from a stream is called the riparian zone.

Here's why:

* Riparian comes from the Latin word "ripa," meaning "bank" or "shore".

* This zone is characterized by the transition between the stream or river and the surrounding terrestrial environment.

* It is often characterized by specific plant communities adapted to high moisture levels.

While "uphill from a stream" is a good description of its location, "riparian zone" is the more specific and accurate term for this area.