| Name | Lentinus castoreus var. pusillus Berkeley & M. A. Curtis |
| Authorship | Berkeley & M. A. Curtis |
| Rank | Variety |
| Placed in | Lentinus castoreus Fries |
| Citation | 1868 ["1869"] J. Linn. Soc., Bot. 10(no. 45): 303 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Lentinus castoreus var. pusillus Berkeley & M. A. Curtis |
| Identification made in | [no date] (2) |