| Classification | Euphorbiaceae: Euphorbia |
| Type Status | Syntype |
| Collector | A. Nelson |
| Collector number | 581 |
| Country | United States of America |
| State | Wyoming |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Wyoming |
| Locality | Mexican mines |
| Date Collected | 1894-07-20 |
| Container | Flora of Wyoming |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/33008eed-78ad-4c51-bf10-12d669383dd8 |
| Herbarium | GH |
| Family | Euphorbiaceae |
| Determination | Euphorbia dictyosperma Fischer & C. A. Meyer |
| Determination Remarks | [is label name] [is Current name] |
| Family | Euphorbiaceae |
| Type Status | Syntype |
| Syntype of | Euphorbia arkansana var. atrosemina Norton |
| Verified by | D. Geltman (LE) |
| Date Determined | 2009-10-** |
| Taxon Reference | (for Euphorbia arkansana var. atrosemina Norton) Rep. (Annual) Missouri Bot. Gard. 1899. 11: 105. |
| Sex | not determined |
| Phenology | NotDetermined |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
