question:  Which species, Cardwellia or Ochagavia, is native to South America?
answer: Ochagavia
context: Title: Cardwellia
  Passage: Cardwellia is a genus of a sole described species of large trees, constituting a part of the plant family Proteaceae.  The species Cardwellia sublimis (northern silky oak) grows naturally only (endemic) in the rainforests of the wet tropics region of north eastern Queensland, Australia.  Other common names include bull oak, golden spanglewood, lacewood, oak and oongaary.  The compound leaves have up to 17 leaflets.  It produces white inflorescences followed by woody fruits which are prominently displayed outside the canopy.
  Title: Ochagavia
  Passage: Ochagavia is a genus of the botanical family Bromeliaceae, subfamily Bromelioideae.  The genus is named for Sylvestris Ochagavia, Chilean minister of education.  Endemic to southern and central Chile (including the Juan Fernández Islands), this genus is represented by four accepted species.
  Title: Arachis
  Passage: Arachis is a genus of about 70 species of annual and perennial flowering plants in the pea family (Fabaceae), native to South America, and was recently assigned to the informal monophyletic "Pterocarpus" clade of the Dalbergieae.  At least one species, the peanut ("Arachis hypogaea"), is a major food crop species of global importance; some of the other species are cultivated for food to a small extent in South America.  Other species such as "A. pintoi" are cultivated worldwide as forage and soil conditioner plants, with the leaves providing high-protein feed for grazing livestock and a nitrogen source in agroforestry and permaculture systems.
citations: Ochagavia Cardwellia