Plants from mainland Australia differ from those from Kangaroo Island (the type locality) by the more or less appressed leaves on new growth and are now treated as a distinct subspecies, Choretrum spicatum subsp. continentale. See subspecies profile for description.
Source:
Jeanes, J.A. (1999). Choretrum. In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 4, Cornaceae to Asteraceae, pp. 31–32. Inkata Press, Melbourne.