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.
Schizachyrium Schizachyrium is a widespread genus of plants in the grass family. The name is derived from the Greek words σχίζειν ("schizein"), meaning "to split," and ἄχυρον ("achyron"), meaning "chaff." It refers to either the glume or the toothed lemmas.