Rock, H.F.L. (1957), A revision of the vernal species of Helenium (Compositae) [continued]. Rhodora 59(702): 131, adnot. [comb. nov.]

basionym: Gaillardia amara Raf. legitimate taxonomic synonym: Helenium tenuifolium Nutt. legitimate

Kleinschmidt, H.E. & Johnson, R.W. (1977), Weeds of Queensland: 384 [secondary reference]

Stanley, T.D. in Stanley, T.D. & Ross, E.M. (1986), Asteraceae. Flora of South-eastern Queensland 2: 566 [secondary reference]

nomenclatural synonym: Gaillardia amara Raf. legitimate taxonomic synonym: Helenium tenuifolium Nutt. legitimate common name: American Sneezeweed [n/a] common name: Bitter Sneezeweed [n/a]

Council of Heads of Australasian Herbaria (2011), Australian Plant Census: - APC [secondary reference]

nomenclatural synonym: Gaillardia amara Raf. legitimate

• APC Dist.: Qld (naturalised)

Bean, A.R. in Wilson, A.J.G. (ed.) (2015), Helenium. Flora of Australia 37: 445-446, map [secondary reference]

nomenclatural synonym: Gaillardia amara Raf. legitimate taxonomic synonym: Helenium tenuifolium Nutt. legitimate

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