Subject
- Draba -- Oregon1
- Ecohydrology -- Oregon -- Steens Mountain1
- Ecological disturbances -- Oregon, Eastern1
- Ecological succession -- Sheldon National Wildlife Refuge (Nev. and Or.)1
- Endemic plants -- Columbia Plateau -- Geographical distribution1
- Endemic plants -- Effect of grazing on -- Oregon, Eastern1
- Endemic plants -- Idaho -- Craters of the Moon National Preserve1
- Endemic plants -- Oregon -- John Day Fossil Beds National Monument1
- Endemic plants -- Oregon, Eastern1
- Fire ecology -- California -- Lava Beds National Monument1
- Fire ecology -- Oregon -- John Day Fossil Beds National Monument1
- Fire ecology -- Oregon, Eastern1
- Fire ecology -- Sheldon National Wildlife Refuge (Nev. and Or.)1
- Fire ecology -- Wyoming1
- Grasses1
- Grasses -- Oregon -- Ecology1
- Grasses -- Seedlings -- Ecology -- Oregon, Eastern1
- Grasses -- Seeds -- Oregon, Eastern1
- Grassland ecology -- Idaho1
- Grassland ecology -- Oregon, Eastern1