Trees surviving 50 years after 1932 in two Urbana, Illinois neighborhoods.
| Tree species | Number of surviving trees | Total basal area in 1932 (ft2) | Total basal area in 1982 (ft2) |
|---|---|---|---|
| Acer saccharinum (Silver maple) | 24 | 13.20 | 158.27 |
| Acer saccharum (Sugar maple) | 24 | 30.17 | 101.51 |
| Platanus occidentalis (Sycamore) | 9 | 10.61 | 43.44 |
| Celtis occidentalis (Common hackberry) | 8 | 10.53 | 42.13 |
| Acer rubrum (Red maple) | 3 | 0.06 | 42.13 |
| Catalpa speciosa (Western catalpa) | 2 | 1.77 | 13.20 |
| Fraxinus pennsylvanica (Green ash) | 2 | 1.76 | 11.38 |
| Ailanthus altissima (Tree of heaven) | 1 | 0.23 | 7.30 |
| Ulmus pumila (Siberian elm) | 1 | 0.68 | 6.13 |
| Ulmus americana (American elm) | 1 | 0.11 | 4.41 |
| Quercus rubra (Red oak) | 1 | <0.01 | 7.71 |
| Morus alba (Mulberry) | 1 | <0.01 | 9.01 |