<Table> <Tr> <Th_colspan="2"> Rhubarb </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th_colspan="2"> Scientific classification </Th> </Tr> <Tr> <Td> Kingdom: </Td> <Td> Plantae </Td> </Tr> <Tr> <Td> Clade: </Td> <Td> Angiosperms </Td> </Tr> <Tr> <Td> Clade: </Td> <Td> Eudicots </Td> </Tr> <Tr> <Td> Order: </Td> <Td> Caryophyllales </Td> </Tr> <Tr> <Td> Family: </Td> <Td> Polygonaceae </Td> </Tr> <Tr> <Td> Genus: </Td> <Td> Rheum </Td> </Tr> <Tr> <Td> Species: </Td> <Td> R. rhabarbarum </Td> </Tr> <Tr> <Th_colspan="2"> Binomial name </Th> </Tr> <Tr> <Td_colspan="2"> Rheum rhabarbarum L . </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Rhubarb </Th> </Tr>

What family is the rhubarb a part of