Over 1000 species of vascular plants grow in Grand Teton National Park and the surrounding area. Soil conditions, availability of moisture, slope, aspect, and elevation all determine where plants grow. Plants that require similar conditions are often found growing in the same area. These associations form various plant communities. It is useful to divide the plants of Grand Teton National Park into the following communities: sagebrush flats, riparian corridors and wetlands, forests, and alpine areas.