Which is in the grass family, Pachypodium or Arrhenatherum?
Pachypodium Pachypodium is a genus of succulent spine-bearing trees and shrubs, native to Madagascar and Africa. It belongs to the dogbane family, Apocynaceae. "Pachypodium" comes from a Latin form from Greek "pachus" (thick) and "podion" (foot) (or Gk podos, root form of pous, foot), hence meaning "thick-footed".
Brachypodium pinnatum Brachypodium pinnatum, the heath false brome or tor-grass, is a plant in the grass family, with a widespread distribution in temperate regions of the Northern Hemisphere. It typically grows in calcareous grassland, and reaches 70 – tall. The flowerhead is open, with 10 to 15 erect spikelets.