| Classification | Euphorbiaceae: Euphorbia |
| Harvard University Herbaria Barcode(s) | 00267478 |
| Type Status | Isolectotype |
| Collector | C. G. Pringle |
| Country | United States of America |
| State | Arizona |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Arizona |
| Locality | Foothills of the Santa Rita Mountains |
| Date Collected | 1884-05-19 |
| Container | Flora of the Pacific Slope. |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/b6bffc05-d90a-47ad-9247-629c5c8651ff |
| Harvard University Herbaria Barcode | 00267478 |
| Herbarium | GH |
| Family | Euphorbiaceae |
| Determination | Euphorbia dictyosperma Fischer & C. A. Meyer |
| Determination Remarks | [is label name] |
| Family | Euphorbiaceae |
| Determination | Euphorbia arkansana var. atrosemina Norton |
| Determined by | Norton, John Bitting Smith |
| Date Determined | 1899-05-20 |
| Annotation Text | type n. var. |
| Family | Euphorbiaceae |
| Determination | Euphorbia spathulata Lamarck |
| Determined by | Kathryn Mauz |
| Date Determined | 2017-01-16 |
| Determination Remarks | [is Current name] |
| Family | Euphorbiaceae |
| Type Status | Isolectotype |
| Isolectotype of | Euphorbia arkansana var. atrosemina Norton |
| Verified by | Kathryn Mauz |
| Date Determined | 2017-01-16 |
| Determination Remarks | [is filed under name] |
| Annotation Text | Lectotype: (US) |
| Taxon Reference | (for Euphorbia arkansana var. atrosemina Norton) Rep. (Annual) Missouri Bot. Gard. 1899. 11: 105. |
| Sex | not determined |
| Phenology | Fruit |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
