| Common Name | Scientific Name | Code |
| American witchhazel | Hamamelis virginiana L. | HAVI4 |
| dwarf witchalder | Fothergilla gardenii L. | FOGA |
| Fothergilla gardenii | Fothergilla parvifolia Kearney | FOPA |
| Hamamelis vernalis | Hamamelis vernalis Sarg. var. tomentella (Rehd.) Palmer | HAVET |
| Hamamelis virginiana | Hamamelis macrophylla Pursh | HAMA6 |
| Hamamelis virginiana | Hamamelis virginiana L. var. henryi Jenne | HAVIH |
| Hamamelis virginiana | Hamamelis virginiana L. var. macrophylla (Pursh) Nutt. | HAVIM |
| Hamamelis virginiana | Hamamelis virginiana L. var. parvifolia Nutt. | HAVIP |
| ironwood | Parrotia C. A. Mey. | PARRO |
| mountain witchalder | Fothergilla major (Sims) Lodd. | FOMA |
| Oriental sweetgum | Liquidambar orientalis Miller | LIOR2 |
| Ozark witchhazel | Hamamelis vernalis Sarg. | HAVE2 |
| Persian ironwood | Parrotia persica (DC.) C.A. Mey. | PAPE18 |
| sweetgum | Liquidambar L. | LIQUI |
| sweetgum | Liquidambar styraciflua L. | LIST2 |
| winter hazel | Corylopsis Sieb. & Zucc. | CORYL2 |
| winter hazel | Corylopsis sinensis Hemsl. | COSI12 |
| witchalder | Fothergilla L. | FOTHE |
| witchhazel | Hamamelis L. | HAMAM |