| Name | Epilobium clavatum Trelease | 
| Authorship | Trelease | 
| Rank | Species | 
| Placed in | Epilobium Linnaeus | 
| Citation | 1891 Rep. (Annual) Missouri Bot. Gard. 2: 111, pl. 48 | 
| Holdings | 77 Specimens held in the Harvard University Herbaria identified as Epilobium clavatum Trelease | 
| Identification made in | [no date] (60), 1960 (1), 1978 (2), 1979 (9), 1981 (3), 1987 (1), 1995 (1) |