Which is a type of grass, Pleurothallis or Lamarckia?
Pleurothallis Pleurothallis, abbreviated Pths in horticultural trade, is a genus of orchids commonly named bonnet orchids. The genus name is derived from the Greek word 'pleurothallos', meaning 'riblike branches'. This refers to the rib-like stems of many species.
Ischaemum nativitatis Ischaemum nativitatis, commonly known as the Christmas Island duck-beak, is a tropical grass in the Poaceae family. It is endemic to Christmas Island, an Australian territory in the north-eastern Indian Ocean. The specific epithet comes from the Latin "nativitas" ("birth") referring to the birth of Christ, or Christmas, after the name of the island.