| Classification | Rosaceae: Horkelia | 
| Harvard University Herbaria Barcode(s) | 00443817 | 
| Type Status | Isotype,  Isolectotype | 
| Collector | J. M. Bigelow | 
| Country | United States of America | 
| State | California | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: California: Sonoma County | 
| Locality | Laguna of St. [Santa] Rosa Creek | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/1e0fce26-04c7-402c-bfc2-1385c62f957f | 
| Harvard University Herbaria Barcode | 00443817 | 
| Herbarium | GH | 
| Family | Rosaceae | 
| Type Status | Isotype | 
| Isotype of | Horkelia fusca var. tenuiloba Torrey | 
| Verified by | Keck, David Daniels | 
| Date Determined | 1938 | 
| Taxon Reference | (for  Horkelia fusca var. tenuiloba Torrey) Pacific Railr. Rep. 4, Pt. 5, No. 4 (Whipple) 1857. 84. | 
| Family | Rosaceae | 
| Type Status | Isolectotype | 
| Isolectotype of | Horkelia fusca var. tenuiloba Torrey | 
| Verified by | Ertter, Barbara J. | 
| Date Determined | 2013-04-** | 
| Determination Remarks | [filed under] | 
| Taxon Reference | (for  Horkelia fusca var. tenuiloba Torrey) Pacific Railr. Rep. 4, Pt. 5, No. 4 (Whipple) 1857. 84. | 
| Family | Rosaceae | 
| Determination | Horkelia tenuiloba (Torrey) A. Gray | 
| Determined by | Ertter, Barbara J. | 
| Date Determined | 1988 | 
| Determination Remarks | [current name] | 
| Family | Rosaceae | 
| Determination | Horkelia tenuiloba (Torrey) A. Gray | 
| Determined by | Keck, David Daniels | 
| Date Determined | 1938 | 
| Family | Rosaceae | 
| Determination | Horkelia congesta Douglas ex Hooker | 
| Determined by | [A. Gray (scripsit) annotation on field label, W. T. Kittredge, 2013] | 
| Annotation Text | var.! | 
| Family | Rosaceae | 
| Determination | Horkelia tenuiloba (Torrey) A. Gray | 
| Determination Remarks | [label name] | 
| Annotation Text | (H. fusca var. tenuiloba, Torr.) | 
| Family | Rosaceae | 
| Determination | Horkelia fusca var. tenuiloba Torrey | 
| Determined by | [on field label] | 
| Phenology | Flower | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |