Which is in the grass family, Pachypodium or Arrhenatherum?
Arrhenatherum Arrhenatherum, commonly called oatgrass or button-grass, is a genus of Eurasian and North African plants in grass family.
Rumex graminifolius Rumex graminifolius, common name grassleaf sorrel, is a species of the genus "Rumex" and the knotweed family Polygonaceae.