Which species appears in areas more westernly, Cleistocactus or Rhynchostylis?
Cleistocactus: Cleistocactus is a genus of columnar cacti native to mountainous areas - to 3000 m - of Peru, Uruguay, Bolivia and Argentina. Rhynchostylis: Rhynchostylis (abbreviated Rhy in the horticultural trade) is a genus in the orchid family (Orchidaceae), closely allied to the genus "Vanda" (from which it differs in the one-lobed lip of the flower) and comprising four currently accepted species native to the Indian Subcontinent, China, Indochina, Malaysia, Indonesia and the Philippines.
Cleistocactus