Subject
- Acclimatization (Plants)1
- Coastal ecology -- Oregon1
- Coastal plants -- Oregon1
- Coasts -- Oregon1
- Forest ecology -- Oregon -- Willamette River Valley1
- Forests and forestry -- Oregon -- Illinois River Basin1
- Foxtail1
- Grassland ecology -- Oregon1
- Oregon oak -- Ecology -- Oregon -- Willamette River Valley1
- Plant communities -- Oregon1
- Plant communities -- Oregon -- Willamette River Valley1
- Plant succession1
- Prairies -- Oregon -- Pacific Coast1
- Sand dunes1
- Shrubs -- Oregon1
- Sitka spruce1