| Quercus rubra Northern Red Oak |
1 |
|
| Quercus robur English Oak |
1 |
|
| Quercus myrsinaefolia |
1 |
|
| Quercus infectoria Gall Oak; Dyer's Oak; Aleppo Oak |
2 |
|
| Quercus championi |
1 |
|
| Quercus bambusaefolia |
1 |
|
| Quercus alba White Oak |
1 |
|
| Quisqualis indica Rangoon Creeper |
1 |
|
| Rauvolfia vomitoria African Snakeroot |
1 |
|
| Rauvolfia tetraphylla Four-Leaf Devilpepper; Pinque-Pinque |
1 |
|
| Rauvolfia serpentina Indian Snakeroot; Serpentine Wood |
1 |
|
| Rhododendron ponticum Pontic Alpenrose |
1 |
|
| Rhododendron grande |
1 |
|
| Rhododendron ferrugineum Rusty-Leaved Alpenrose |
1 |
|
| Rhododendron falconeri |
1 |
|
| Rhododendron dauricum Chinese Alpenrose |
2 |
|
| Rhododendron arboreum |
1 |
|
| Rhodomyrtus tomentosa |
1 |
|
| Rhus toxicodendron Poison Ivy |
1 |
|
| Rhus coriaria Sumac; Tanner's Sumac; Sicilian Sumac |
2 |
|