Rye, B.L. (11 January 1995), New and priority taxa in the genera Spyridium and Trymalium (Rhamnaceae) of Western Australia. Nuytsia 10(1): 128, APC [comb. nov.]

• Type: [Western Australia], J. Drummond 5th coll., suppl. 91 (KW photo seen, MEL).

basionym: Trymalium polycephalum Turcz. legitimate

• APC Dist.: WA

Rye, B.L. (31 July 1996), A synopsis of the genera Pomaderris, Siegfriedia, Spyridium and Trymalium (Rhamnaceae) in Western Australia. Nuytsia 11(1): 123, Fig. 6C (map) [secondary reference]

nomenclatural synonym: Trymalium polycephalum Turcz. legitimate

Kellermann, J., Mosyakin, S.L., Clowes, C. & Udovicic, F. (1 December 2022), Australian species of Rhamnaceae published by Turczaninow, their types, current names and synonyms. Swainsona 36: 141 [secondary reference]

nomenclatural synonym: Trymalium polycephalum Turcz. legitimate

• Etymology: "From the Greek πολυ- (poly-; many) and κεφαλη (cephale; head), because of the numerous flowerheads in the holotype specimen."

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