Fukuryū (覆輪 o 福隆) meaning "additional ribs", Yonryū (四棱) "four-ribbed"), and Ranpōkaku (鸞鳳閣 ) referring to the spotless, naked form) are Japanese terms for rare aesthetic mutations. Together, they create a knobby, three-dimensional appearance. Highly valued in cultivation, these traits are sought after for their unique structure and collectible appeal.