Geographic distribution: India, Bhutan, China, Korea and Japan (Hattori & Lin, 1985).
Hattori & Lin (1985) assigned F. inflexa to subg. Australes and noted that it was the only species of the subgenus represented in E. Asia. However, this species is monoicous and the lobules are not strongly campanulate (as also noted by Hattori & Lin ibid), and subsequently the lobules are not restricted above mouth. Therefore, F. inflexa is not recognised under the current circumscription of the subgenus. Morphologically the species appears more similar to species of subg. Trachycolea.