Fryxell, P.A. (1965), A revision of the Australian species of Gossypium with observations on the occurrence of Thespesia in Australia (Malvaceae). Australian Journal of Botany 13(1): 85 [tax. nov.]

• Type: Gossypium costulatum Tod.

• Comment: Given as GOSSYPIUM sect. HIBISCOIDEA subsect. GRANDICALYX.

Fryxell, P.A. (1969), A Classification of Gossypium L. (Malvaceae). Taxon 18(5): 586-587 [secondary reference]

Fryxell, P.A. (1978), The Natural History of the Cotton Tribe: 52 [basionym]

basionym of: Gossypium sect. Grandicalyx Fryxell legitimate

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