| Classification | Asteraceae: Hymenoclea | 
| Classification 1 | Asteraceae: Ambrosia | 
| Harvard University Herbaria Barcode(s) | 00283107 | 
| Type Status | Isosyntype | 
| Collector | A. Nelson & R. A. Nelson | 
| Collector number | 1340 | 
| Country | United States of America | 
| State | Arizona | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Arizona: Yuma County | 
| Locality | Mohawk Mtns. [Mountains] | 
| Date Collected | 1935-03-29 | 
| Habitat | Roadsides in the desert | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/58895012-971d-4aa0-acb3-bc48ad92b736 | 
| Harvard University Herbaria Barcode | 00283107 | 
| Herbarium | GH | 
| Previous ownership | ex (RM) | 
| Family | Asteraceae | 
| Type Status | Isosyntype | 
| Isosyntype of | Hymenoclea hemidioica A. Nelson | 
| Verified by | W. T. Kittredge | 
| Date Determined | 2009 | 
| Taxon Reference | (for  Hymenoclea hemidioica A. Nelson) Amer. J. Bot. 1938. 25: 117. | 
| Family | Asteraceae | 
| Determination | Ambrosia salsola var. pentalepis (Rydberg) Stother & B. G. Baldwin | 
| Determined by | W. T. Kittredge | 
| Date Determined | 2009 | 
| Determination Remarks | [current name] | 
| Family | Asteraceae | 
| Determination | Hymenoclea hemidioica A. Nelson | 
| Determination Remarks | [label name] | 
| Annotation Text | n. sp. | 
| Sex | not determined | 
| Phenology | Flower | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed | 
| Item Remarks | [mounted with Isosyntype of Hymenoclea hemidioica A. Nelson, A. Nelson & R. A. Nelson 1341, 283106] |