Persoon, C.H. (September 1807), Synopsis plantarum, seu enchiridium botanicum, complectens enumerationem systematicam specierum 2(2): 630 [tax. nov.]

• Type: Cycas L.

Dixon, W.A. (1906), The Plants of New South Wales: 1, 248 [secondary reference]

Bailey, F.M. (1913), Comprehensive Catalogue of Queensland Plants: 513 [secondary reference]

Ross, E.M. in Stanley, T.D. & Ross, E.M. (1989), Cycadaceae. Flora of South-eastern Queensland 3: 448 [secondary reference]

Johnson, L.A.S. & Wilson, K.L. in Kubitzki, K. (ed.) (1990), Cycadaceae. The Families and Genera of Vascular Plants 1: 370, Fig. 207 [secondary reference]

Wheeler, J.R. in Wheeler, J.R. (ed.) (1992), Cycadaceae. Flora of the Kimberley Region: 50 [secondary reference]

Hill, K.D. in McCarthy, P.M. (ed.) (1998), Cycadaceae. Flora of Australia 48: 598-635 [secondary reference]

Cooper, W.E. & Cooper, W.T. (2004), Fruits of the Australian Tropical Rainforest: 1 [secondary reference]

Council of Heads of Australasian Herbaria (2008), Australian Plant Census: - APC [secondary reference]

• APC Dist.: WA, ChI, NT, Qld

Mabberley, D.J. (1 May 2008), Mabberley's Plant-Book Edn. 3: 929 [secondary reference]

Christenhusz, M.J.M., Reveal, J.L, Farjon, A., Gardner M.F., Mill, R.R. & Chase, M.W. (2011), A new classification and linear sequence of extant gymnosperms. Phytotaxa 19: 57 [secondary reference]

Soltis, D.E., Smith, S.A., Cellinese, N., Wurdack, K.J., Tank, D.C., Brockington, S.F., Refulio-Rodriguez, N.F., Walker, J.B., Moore, M.J., Carlswars, B.S., Bell, C.D., Latvis, M., Crawley, S., Black, C., Diouf, D., Xi, Z., Rushworth, C.A., Gitzendanner, M.A., Sytsma, K.J., Qui, Y., Hilu, K.W., Davis, C.C., Sanderson, M.J., Beaman, R.S., Olmstead, R.G., Judd, W.S., Donoghue, M.J. & Soltis, P.S. (1 April 2011), Angiosperm Phylogeny: 17 genes, 640 taxa. American Journal of Botany 98(4): Fig. 2A [secondary reference]

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