| Name | Quercus pilicaulis f. concava C. H. Müller |
| Authorship | C. H. Müller |
| Rank | Forma |
| Placed in | Quercus pilicaulis Trelease |
| Citation | 1937 Amer. Midl. Naturalist 18(5): 851 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Quercus pilicaulis f. concava C. H. Müller |
| Identification made in | 2023 (1) |