| Classification | Isoetaceae: Isoetes | 
| Harvard University Herbaria Barcode(s) | 00021433 | 
| Type Status | Isosyntype | 
| Collector | A. F. Regnell | 
| Collector number | III 1506 | 
| Country | Brazil | 
| State | Minas Gerais | 
| Geography | South America: South America (Region) (Region): Brazil: Minas Gerais | 
| Locality | Caldas | 
| Date Collected | 1864-12-18 | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/664c723b-26c9-4512-9b40-25c2d26d0a57 | 
| Harvard University Herbaria Barcode | 00021433 | 
| Herbarium | GH | 
| Family | Isoetaceae | 
| Type Status | Isosyntype | 
| Isosyntype of | Isoetes martii A. Brown ex Kuhn | 
| Verified by | R. James Hickey | 
| Date Determined | 2005 | 
| Determination Remarks | corm eaten away - few sporagia left | 
| Taxon Reference | (for  Isoetes martii A. Brown ex Kuhn) Fl. Bras. [Martius] 1884. 1(1): 82. | 
| Family | Isoetaceae | 
| Determination | Isoetes martii A. Brown ex Kuhn | 
| Determined by | R. James Hickey | 
| Date Determined | 1998-10-13 | 
| Determination Remarks | [current name] | 
| Sex | not determined | 
| Phenology | NotDetermined | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |