Wilson, Paul G. (10 December 1970), A taxonomic revision of the genera Crowea, Eriostemon and Phebalium (Rutaceae). Nuytsia 1(1): 116-117, Map 34 [tax. nov.]

• Type: "AD 96434202, New South Wales, near Olinda, Rylstone District, 2,700 ft., sandstone ridge, 6–8 ft. high, flowers nodding, green, pedicels red, filaments green, anthers yellow, 2.ix.1951, L.A.S. Johnson. Isotypus: NSW 69695."

• Etymology: "sympetalus = having united petals"

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 194 [secondary reference]

Weston, P.H. & Porteners, M.F. in Harden, G.J. (ed.) (1991), Phebalium. Flora of New South Wales 2: 263 [secondary reference]

common name: Rylstone Bell [n/a]

Threatened Species and Communities Section, Biodiversity Group, Environment Australia (8 July 1998), Endangered Species Protection Act 1992. Schedules 1, 2 & 3: 24 [secondary reference]

Wilson, Paul G. (16 September 1998), New species and nomenclatural changes in Phebalium and related genera (Rutaceae). Nuytsia 12(2): 277 [basionym]

basionym of: Leionema sympetalum (Paul G.Wilson) Paul G.Wilson legitimate

Weston, P.H. & Harden G.J. in Harden, G.J. (ed.) (2002), Leionema. Flora of New South Wales Revised Edition 2: 310 [nomenclatural synonym]

nomenclatural synonym of: Leionema sympetalum (Paul G.Wilson) Paul G.Wilson legitimate

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