Ex situ collections:
| Botanical name | Common name | Variety name / Accession name | Accession number | Part of the MLS |
|---|---|---|---|---|
| Rhododendron | Rhododendron | Jacksonii | 200353 | - |
| Rhododendron | Rhododendron | Blaumeise | 200354 | - |
| Rhododendron | Rhododendron | Elisabeth Hobbie Group | 200357 | - |
| Rhododendron | Rhododendron | Rock Rose | 200358 | - |
| Rhododendron | Rhododendron | Brandywine | 200361 | - |
| Rhododendron | Rhododendron | Banana Boat | 200362 | - |
| Rhododendron | Rhododendron | Anna Baldsiefen | 200364 | - |
| Rhododendron | Rhododendron | Donna Totten | 200365 | - |
| Rhododendron | Rhododendron | Ginny Gee | 200367 | - |
| Rhododendron | Rhododendron | Spring Glory | 200415 | - |