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.
Taxonomy of Pachypodium The taxonomy of the "Pachypodium genus" is the study of the species and subspecies in the genus "Pachypodium". There are currently 25 recognized species in the genus, of which 17 are shrubs and eight are trees.