R. mekongense var mekongense Melinanthum Group
Species
| Subgenus | Rhododendron |
| Section | Rhododendron |
| Subsection | Trichoclada |
| Bloom Time | ? |
| Flower | ? |
| Flower Color | ? |
| Fragrance | ? |
| Leaves | ? |
| Leaf persistence | Evergreen |
| Minimum Hardiness | ? |
| Subgenus | Rhododendron |
| Section | Rhododendron |
| Subsection | Trichoclada |
| Bloom Time | ? |
| Flower | ? |
| Flower Color | ? |
| Fragrance | ? |
| Leaves | ? |
| Leaf persistence | Evergreen |
| Minimum Hardiness | ? |