Subject
- Botany -- Alaska -- Aniakchak, Mount1
- Bryophytes -- Coast Ranges1
- Bryophytes -- Oregon1
- Epiphytic lichens -- Coast Ranges1
- Epiphytic lichens -- Oregon1
- Forest ecology -- Oregon1
- Hackberry -- Ecology -- Idaho1
- Lichen communities -- Climatic factors -- Oregon, Western1
- Lichen communities -- Ecology -- Oregon, Western1
- Lichen communities -- Effect of air pollution on -- Oregon, Western1
- Lichens -- Climatic factors -- Oregon, Western1
- Lichens -- Ecology -- Oregon, Western1
- Lichens -- Effect of air pollution on -- Alaska -- Tongass National Forest1
- Lichens -- Effect of air pollution on -- Oregon1
- Lichens -- Effect of air pollution on -- Oregon, Western1
- Lichens -- Oregon1
- Plant communities -- Oregon1
- Vegetation dynamics -- Alaska -- Aniakchak, Mount1