| Name | Eriogonum microthecum var. ambiguum (M. E. Jones) Reveal |
| Authorship | (M. E. Jones) Reveal |
| Rank | Variety |
| Placed in | Eriogonum microthecum Nuttall |
| Holdings | 23 Specimens held in the Harvard University Herbaria identified as Eriogonum microthecum var. ambiguum (M. E. Jones) Reveal |
| Identification made in | [no date] (16), 1968 (3), 1992 (4) |