 It can be distinguished from the forest tree fern ("A. capensis") by its thick trunk, and by its smallest (third level) leaflets.The leaflets of "A. dregei" have smooth (entire) margins, while those of "A. capensis" are serrated.Each leaflet of "A. dregei" has multiple seedcases on its underside, while a leaflet of "A. capensis" has only one per leaflet.