👉 Macrothamnium is a type of plant that grows more than 25 centimeters (8 inches) in height and has an average width of around 10 centimeters (4 inches). It is commonly known as "the largest flower" due to its size. Macrothamniums are typically found growing in damp, shaded areas, such as gardens or parks, and have a distinctive shape with a round base and a pointed tip.