Simplify the following text for a Grade 7 native English-speaking person.
Original: These trees , by locals referred to as QueÃ ua , Yagual and other names , can be found at altitudes of 4500 m above sea level .
Simplified: These trees , by locals are called QueÃ ua , Yagual and other names , can be found at altitudes of 4500 m above sea level .