| Name | Megalastrum canescens (Mettenius) A. R. Smith & R. C. Moran |
| Authorship | (Mettenius) A. R. Smith & R. C. Moran |
| Rank | Species |
| Placed in | Megalastrum |
| Citation | 1988 ("1987") Amer. Fern J. 77: 127 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Megalastrum canescens (Mettenius) A. R. Smith & R. C. Moran |
| Identification made in | 2000 (1), 2007 (1) |