Savi, G. (1810), Observationes in varias trifoliorum species: 46, fig. 2 [tax. nov.]

• Type: "Spontaneum Trifolium hoc reperitur in aggeribus, et in aridioribus locis Agri Pisani, et in collibus Florentinis et Semensibus."

Ewart, A.J. (1908), Contributions to the Flora of Australia No. VIII. The Victorian Naturalist 24(12): 194 [secondary reference]

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

• APC Comment: A widespread taxon, now referred to Trifolium echinatum M.Bieb. var. echinatum, recorded by A.J.Ewart, Vict. Naturalist 24: 194 (1908), but not known to be established in Australia.

Roma-Marzio, F., D'Antraccoli, M., Astuti, G., Maccioni, S., Amadei, L. & Peruzzi, L. (2018), Typification of the names in Trifolium described by Gaetano Savi. Taxon 67(2): 412, Fig. 2 [secondary reference]

• Lectotype: "(designated here): [illustration] “Trifolium Supinum” in Savi, Observ. Trifol. Sp.: fig. 2. 1810."

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