Definition: Macropteran is a genus of flowering plants in the family Asteraceae. It belongs to the subfamily Macropteridinae, which comprises 16 species, with over 200 genera and about 5,000 species. Macropterans are known for their large size, as well as their ability to produce large flowers that can be up to 3 meters (10 feet) tall. Macropteran plants have a unique adaptation called the "chamber