| Name | Eriogonum microtheca var. effusum (Nuttall) Torrey & A. Gray |
| Authorship | (Nuttall) Torrey & A. Gray |
| Rank | Variety |
| Placed in | Eriogonum microtheca Nuttall |
| Citation | 1870 Eriogonum 8: 172 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Eriogonum microtheca var. effusum (Nuttall) Torrey & A. Gray |
| Identification made in | [no date] (1) |
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