A more thorough explanation:

The United States Botanic Garden is a garden located on the grounds of the U.S. Capitol. It is a place where plants are grown for special events, public viewing, and scientific research. The garden has many rare plants that are available for students and scientists to study.

For example, the garden has a collection of orchids that are not found anywhere else in the world. These orchids are carefully cultivated and studied by scientists to learn more about their unique characteristics and how they can be protected.

Another example is the medicinal plant collection at the garden. This collection includes plants that have been used for centuries to treat various illnesses. Scientists study these plants to learn more about their medicinal properties and how they can be used to develop new medicines.

The United States Botanic Garden is an important resource for scientists, students, and the public. It provides a place to learn about plants and their importance to our world.