| Classification | Potamogetonaceae: Potamogeton | 
| Barcode(s) | 00022627 | 
| Type Status | Holotype | 
| Collector | John A. Moore & J. A. Steyermark | 
| Collector number | 3088 | 
| Country | United States of America | 
| State | Texas | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Texas: Jeff Davis County | 
| Locality | Little Ajuga Canyon, Davis Mountains | 
| Date Collected | 1931-06-15 | 
| Elevation | 1575 m | 
| Verbatim Elevation | 1575 m. | 
| Habitat | pool in rock | 
| Container | Plants of Texas | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/a5e8c91c-cd22-436e-a7f6-418a99f7b447 | 
| Harvard University Herbaria Barcode | 00022627 | 
| Herbarium | GH | 
| Family | Potamogetonaceae | 
| Type Status |  Holotype | 
| Holotype of |  Potamogeton clystocarpus Fernald | 
| Verified by | Reveal, James Lauritz & Kaplan, Zdenek | 
| Date Determined | 2012 | 
| Determination Remarks |  [filed under] | 
| Annotation Text | Holotype! | 
| Taxon Reference | (for  Potamogeton clystocarpus Fernald) Mem. Gray Herb. 1932. 3: 79. | 
| Family | Potamogetonaceae | 
| Determination |  Potamogeton berchtoldii subsp. clystocarpus (Fernald) Les & Tippery | 
| Determined by | Hanrahan, Danielle | 
| Date Determined | 2015-11-** | 
| Determination Remarks |  [current name] | 
| Annotation Text | fide James L. Reveal (BH) & Z. Kaplan (NY) [see Britonia 65: 454. 2013] | 
| Family | Potamogetonaceae | 
| Determination |  Potamogeton clystocarpus Fernald | 
| Determined by | Haynes, Robert Ralph | 
| Date Determined | 1973 | 
| Annotation Text | Holotype | 
| Family | Potamogetonaceae | 
| Determination |  Potamogeton clystocarpus Fernald | 
| Determination Remarks |  [label name] | 
| Sex | not determined | 
| Phenology | NotDetermined | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |