| Name | Onosma exsertum Hemsley |
| Authorship | Hemsley |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Onosma Linnaeus |
| Citation | 1900 Hooker's Icon. Pl. 27: tab. 2639 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Onosma exsertum Hemsley |
| Identification made in | [no date] (1) |
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