R. viscosum Oblongifolium Group
Species
| Subgenus | Pentanthera |
| Section | Pentanthera |
| Subsection | Pentanthera |
| Bloom Time | ? |
| Flower | ? |
| Flower Color | ? |
| Fragrance | ? |
| Leaves | ? |
| Leaf persistence | Deciduous |
| Minimum Hardiness | ? |
| Subgenus | Pentanthera |
| Section | Pentanthera |
| Subsection | Pentanthera |
| Bloom Time | ? |
| Flower | ? |
| Flower Color | ? |
| Fragrance | ? |
| Leaves | ? |
| Leaf persistence | Deciduous |
| Minimum Hardiness | ? |