Hill, K.D. (8 December 1994), The Cycas media group (Cycadaceae) in New Guinea. Australian Systematic Botany 7(6): 531, figs 3, 4 (map) [tax. nov.]

• Type: Cycas armstrongii Miquel

Hill, K.D. in McCarthy, P.M. (ed.) (1998), Cycadaceae. Flora of Australia 48: 615 [secondary reference]

Council of Heads of Australasian Herbaria (2006), Australian Plant Census: - [secondary reference]

orthographic variant: Cycas ser. Armstrongiosae K.D.Hill orth. var.

Council of Heads of Australasian Herbaria (2006), Australian Plant Census: - [taxonomic synonym]

taxonomic synonym of: Cycas L. legitimate

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