Rhubarb: Genus of plants
Rhubarb is one of about 60 plants in the genus Rheum, family Polygonaceae.
The vegetable rhubarb is Rheum rhabarbarum (or Rheum x hybridum). The leaves are somewhat toxic because they have oxalic acid, but the red stalks are baked in pies, with sugar to soften their tart flavor.
| Rhubarb | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Polygonaceae |
| Genus: | Rheum |
| Species: | R. rhabarbarum |
| Binomial name | |
| Rheum rhabarbarum | |
There are many varieties grown for eating. The drug rheum is prepared from the rhizomes and roots of another species, R. officinale or medicinal rhubarb.
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