| Name | Plagiobothrys granulatus (Piper) I. M. Johnston |
| Authorship | (Piper) I. M. Johnston |
| Rank | Species |
| Placed in | Plagiobothrys |
| Citation | 1932 Contr. Arnold Arbor. 3: 57 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Plagiobothrys granulatus (Piper) I. M. Johnston |
| Identification made in | [no date] (4) |