| Classification | Euphorbiaceae: Euphorbia | 
| Harvard University Herbaria Barcode(s) | 00047724 | 
| Type Status | Isotype | 
| Collector | Edw. Palmer | 
| Country | United States of America | 
| State | Arizona | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Arizona | 
| Locality | Near mouth of Colorado River | 
| Date Collected | 1869 | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/911eab68-35b9-4199-9547-eaf3bb688ca6 | 
| Harvard University Herbaria Barcode | 00047724 | 
| Herbarium | GH | 
| Previous ownership | Ex United States Department of Agriculture | 
| Family | Euphorbiaceae | 
| Type Status | Isotype | 
| Isotype of | Euphorbia platysperma Engelmann ex S. Watson | 
| Taxon Reference | (for  Euphorbia platysperma Engelmann ex S. Watson) Bot. California 1880. 2: 482. | 
| Family | Euphorbiaceae | 
| Determination | Euphorbia platysperma Engelmann ex S. Watson | 
| Determined by | L. C. Wheeler | 
| Date Determined | 1937 | 
| Determination Remarks | [current name] | 
| Family | Euphorbiaceae | 
| Determination | Euphorbia platysperma Engelmann ex S. Watson | 
| Determination Remarks | [label name] | 
| Annotation Text | n. sp. | 
| Sex | not determined | 
| Phenology | NotDetermined | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed | 
| Item Remarks | Mounted with another specimen of Palmer s. n., 1869 (barcode 277263) |