| Classification | Rubiaceae: Tetramerium | 
| Classification 1 | Acanthaceae: Tetramerium | 
| Harvard University Herbaria Barcode(s) | 00283540 | 
| Type Status | Isolectotype | 
| Collector | C. A. Ehrenberg | 
| Collector number | 1072 | 
| Country | Mexico | 
| Geography | North America: North America (CA, US, MX) (Region): Mexico | 
| Locality | [Prope las Ajuntas ad flumen Montezuma] | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/87eb92f4-fe67-4fd7-a129-03a77fc19ec2 | 
| Harvard University Herbaria Barcode | 00283540 | 
| Herbarium | GH | 
| Previous ownership | ex (B) | 
| Family | Rubiaceae | 
| Type Status | Isolectotype | 
| Isolectotype of | Tetramerium hispidum Nees | 
| Verified by | K. N. Gandhi & W. T. Kittredge | 
| Date Determined | 2009 | 
| Determination Remarks | LT: (B) destroyed fide T. F. Daniel, Syst. Bot. Monogr. 12: 46. 1986 | 
| Taxon Reference | (for  Tetramerium hispidum Nees) Prodr. [A. P. de Candolle] 1847. 11: 468. | 
| Family | Acanthaceae | 
| Determination | Tetramerium nervosum Nees | 
| Determined by | T. F. Daniel (ASU) | 
| Date Determined | 1984 | 
| Determination Remarks | [current name] | 
| Family | Rubiaceae | 
| Determination | Tetramerium hispidum Nees | 
| Determined by | G. B. Harp | 
| Date Determined | 1935-12-14 | 
| Family | Rubiaceae | 
| Determination | Tetramerium hispidum Nees | 
| Determination Remarks | [label name] | 
| Sex | not determined | 
| Phenology | Flower | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |