Jeffersonia diphylla | Twinleaf, Rheumatism Root | Berberidaceae | J. binata. Podophyllum diphyllum. | 0 | 2 |
Oxyria digyna | Mountain Sorrel, Alpine mountainsorrel | Polygonaceae | Rheum digynum. | 3 | 1 |
Rheum × hybridum | Garden Rhubarb | Polygonaceae | No synonyms are recorded for this name. Some confusion with R. raponticum auct. R. rhabarbarum auct. and R. x cultorum | 4 | 3 |
Rheum palmatum | Turkey Rhubarb, Chinese Rhubarb - Da Huang, Chinese rhubarb | Polygonaceae | Rheum potaninii, Rheum qinlingense, Rhabarbarum palmatum Moench: Unresolved | 3 | 5 |
Rheum palmatum tanguticum | Da Huang | Polygonaceae | R. tanguticum. (Reg.)Maxim. | 3 | 5 |