Species frequency by size on Maryland roadside tree plots.
| Species and frequency (5% or greater) | |
|---|---|
| Seedlings | |
| Species | Percent of all seedlings |
| Ailanthus altissima | 24% |
| Moms spp. | 17% |
| Robinia pseudoacacia | 7% |
| Ulmus rubra | 7% |
| Corylus cornuta | 5% |
| Juglans nigra | 5% |
| Saplings | |
| Species | Percent of all saplings |
| Acer negundo | 14% |
| Acer rubrum | 12% |
| Cornus florida | 12% |
| Robinia pseudoacacia | 8% |
| Pinus strobus | 5% |
| Moms spp. | 5% |
| Prunus pennsylvanica | 5% |
| Prunus serotina | 5% |
| Pyrus calleryana ‘Bradford’ | 5% |
| Trees | |
| Species | Percent of all trees |
| Acer rubrum | 9% |
| Pyrus calleryana ‘Bradford’ | 9% |
| Prunus serotina | 9% |
| Acer negundo | 7% |
| Quercus palustris | 6% |
| Quercus alba | 5% |