The term TYPE OF PLANT can be solved by two crossword solutions: ARUM (4 letters) and REFINERY (8 letters). ARUM is a type of flowering plant in the family Araceae, which includes plants such as calla lilies and philodendrons. REFINERY is a type of plant that is used to process raw materials into usable products. It is typically used in the oil and gas industry to refine crude oil into gasoline, diesel, and other products.