Shoshone, Sioux, and Paiute
The word you're looking for is "Xerophyte." While it's not directly associated with the Oregon Trail itself, xerophytes are plants adapted to survive in arid climates, which could be relevant to some of the regions encountered along the trail. The Oregon Trail traversed various ecosystems, including areas where drought-resistant plants would thrive.
WHAT WAS THE DANGERS PART OF THE OREGON TRAIL?
The Oregon trail never was modernized. Some parts of the freeway system do follow some of the trail. The current freeway system began in the 1950's.
Some of the main reasons people left for Oregon on the Oregon Trail was for free land and a start of a better life.
cholera
The difficult voyage along the Oregon Trail prompted settlers to carry different medical supplies with them in case of an emergency. Some medical supplies used on the Oregon Trail were surgical instruments, liniments, and bandages.
Some hardships of the Oregon trail was weathering. During thunderstorms a half a dozen people would die from thunderstrikes. Also accidents the wagons they rode were not safe if someone were to fall in front of one then the big wheels would run them over and they would die. Mostly children would die from accidents.
independence rock
In the 1840s, many people traveling the Oregon Trail expected to find fertile land, abundant resources, and opportunities for farming and settlement in Oregon. They were drawn by the promise of a better life, often fueled by stories of lush landscapes and prosperous communities. Additionally, some sought to escape economic hardships or religious persecution in the East. Overall, the allure of Oregon represented hope for a new beginning and prosperity.
The California Trail, Gila Trail, Mormon Trail and The Old Spanish Trail....
back then that was one of the only ways of getting there and supplies that they had to live off of