| Classification | Apiaceae: Cymopterus | 
| Harvard University Herbaria Barcode(s) | 00075905 | 
| Type Status | Isotype | 
| Collector | R. L. Hartman & A. Odasz | 
| Collector number | 9200 | 
| Country | United States of America | 
| State | Wyoming | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Wyoming: Big Horn County | 
| Locality | Big Horn Mountains, ca. 7.3 air miles westnorthwest of Tyrrell Ranger Station, T49N R87W S19 | 
| Date Collected | 1979-06-21 | 
| Elevation | 2134 m | 
| Verbatim Elevation | ELEV. 7000 FT. | 
| Habitat | Sandstone ridge | 
| Substrate | Sandstone ridge topped by limestone | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/9ba32ff1-68a3-4562-9b7b-8e5a67c65aca | 
| Harvard University Herbaria Barcode | 00075905 | 
| Herbarium | GH | 
| Family | Apiaceae | 
| Type Status | Isotype | 
| Isotype of | Cymopterus williamsii R. L. Hartman & Constance | 
| Verified by | Hartman, Ronald Lee & Odasz, A. | 
| Date Determined | 1979-06-21 | 
| Determination Remarks | [filed under] | 
| Annotation Text | ISOTYPE | 
| Taxon Reference | (for  Cymopterus williamsii R. L. Hartman & Constance) Brittonia 1985. 37: 91. | 
| Family | Apiaceae | 
| Determination | Cymopterus williamsii R. L. Hartman & Constance | 
| Determination Remarks | [current name] | 
| Family | Apiaceae | 
| Determination | Cymopterus williamsii R. L. Hartman & Constance | 
| Determination Remarks | [label name] | 
| Sex | not determined | 
| Phenology | Fruit | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |