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.