| Classification | Polygonaceae: Rheum |
| Classification 1 | Polygonaceae: Polygonum |
| Classification 2 | Polygonaceae: Rheum |
| Classification 3 | Polygonaceae: Polygonum |
| Harvard University Herbaria Barcode(s) | 00240152 |
| Type Status | Holotype |
| Collector | C. W. Wang |
| Collector number | 66029 |
| Country | China |
| State | Xizang (Tibet) |
| Geography | Asia: East Asia (Region): China: Xizang (Tibet) |
| Locality | Ngaala, Tsa-wa-rung |
| Date Collected | 1935-08-** |
| Elevation | 3850 m |
| Verbatim Elevation | 3850 m |
| Habitat | Grassy slope |
| Container | Plants of Sikang Province, China |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/67244306-ec92-4b07-b7b0-fa1e2a6bab33 |
| Harvard University Herbaria Barcode | 00240152 |
| Herbarium | A |
| Family | Polygonaceae |
| Determination | Rheum sp. |
| Determination Remarks | [is label name] |
| Family | Polygonaceae |
| Determination | Polygonum chayuum A. J. Li & B. J. Bao |
| Date Determined | 2012-02-** |
| Annotation Text | Typus |
| Family | Polygonaceae |
| Determination | Rheum delavayi Franchet |
| Determined by | Boufford, David Edward |
| Date Determined | 2020-12-24 |
| Determination Remarks | [is Current name] |
| Family | Polygonaceae |
| Type Status | Holotype |
| Holotype of | Polygonum chayuum A. J. Li & B. J. Bao |
| Verified by | Boufford, David Edward |
| Date Determined | 2020-12-24 |
| Determination Remarks | [is filed under name] |
| Taxon Reference | (for Polygonum chayuum A. J. Li & B. J. Bao) Bull. Bot. Res., Harbin 2012. 32: 386.. |
| Sex | not determined |
| Phenology | Flower |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
