| Classification | Brassicaceae: Arabis |
| Classification 1 | Brassicaceae: Boechera |
| Barcode(s) | 00018809 |
| Type Status | Holotype |
| Collector | R. C. Rollins & M. L. Rollins |
| Collector number | 79332 |
| Country | United States of America |
| State | Wyoming |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Wyoming: Fremont County |
| Locality | Wyoming Highway 28, east of the Continental Divide on the southeastern approach to the Wind River Mountains, 42 miles Neast of Farson |
| Date Collected | 1979-06-26 |
| Habitat | coarse granitic soil |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/db8934be-22c9-48a0-82a3-e8c960e2baf0 |
| Harvard University Herbaria Barcode | 00018809 |
| Herbarium | GH |
| Family | Brassicaceae |
| Type Status | Holotype |
| Holotype of | Arabis williamsii Rollins |
| Verified by | Michael Windham (UT) and Ihsan Al-Shehbaz (MO) |
| Date Determined | 2006 |
| Taxon Reference | (for Arabis williamsii Rollins) Syst. Bot. 1981. 6: 62. |
| Family | Brassicaceae |
| Determination | Boechera williamsii (Rollins) Dorn |
| Determined by | Michael Windham (UT) and Ihsan Al-Shehbaz (MO) |
| Date Determined | 2006 |
| Determination Remarks | = Arabis willamsii Rollins [current name] |
| Annotation Text | Holotype Pollen: sexual diploid |
| Sex | not determined |
| Phenology | Fruit |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
