Caption: Cyathea . Comparison of lower surface of central lobe of a middle pinna for four species. A , C. robertsiana  (J.R.Croft et al.  962-B, K). B , C. exilis  (D.L.Jones 1212, K). C , C. woollsiana  (J.R.Croft 1007, K). D , C. australis  (A.Morrison, 4 Mar. 1904, K).Illustrators: P.J.Edwards.
Flora of Australia  Volume 48 (1998) figure 62.