| Name | Hedeoma costatum var. pilchella (Greene) R. S. Irving |
| Authorship | (Greene) R. S. Irving |
| Rank | Variety |
| Placed in | Hedeoma costatum A. Gray |
| Holdings | 10 Specimens held in the Harvard University Herbaria identified as Hedeoma costatum var. pilchella (Greene) R. S. Irving |
| Identification made in | [no date] (7), 1968 (3) |