McGillivray, D.J. (24 February 1986), New Names in Grevillea (Proteaceae): 2 [tax. nov.]

• Type: "Round Hill, 3 miles south of Sassafras. N.S.W. E.F. Constable NSW 57888, 20.IX.1961 (NSW)."

Wrigley, J.W. & Fagg, M. (1989), Banksias, Waratahs & Grevilleas and all other plants in the Australian Proteaceae family: 215 (map) [secondary reference]

• Etymology: "From Latin, asper, rough, and -ulus, the diminutive form; refers to the slightly roughened leaves."

Makinson, R.O. in Harden, G.J. (ed.) (1991), Grevillea. Flora of New South Wales 2: 47 [secondary reference]

McGillivray, D.J & Makinson, R.O. (1993), Grevillea, Proteaceae: a taxonomic revision: 278-280, 408 [secondary reference]

Olde, P.M. & Marriott, N.R. (1995), The Grevillea Book 2: 54-55 (Plate 39, fig., map) [secondary reference]

Makinson, R.O. in Wilson, A.J.G. (ed.) (2000), Grevillea. Flora of Australia 17A: 307, Fig. 27, Map 282 APC [secondary reference]

• APC Dist.: NSW

Makinson, R.O. in Harden, G.J. (ed.) (2002), Grevillea. Flora of New South Wales Revised Edition 2: 51 [secondary reference]

Christenhusz, M.J.M., Fay, M.F. & Byng, J.W. (9 February 2018), GLOVAP Nomenclature Part 1. The Global Flora: a practical flora to vascular plant species of the world 4: 77 [basionym]

basionym of: Hakea asperula (McGill.) Christenh. & Byng legitimate

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