A new species of Urocarpus Drumm. ex Harv. (Rutaceae) is described from near Bindoon, Western Australia. It differs from U. grandiflorus (Hook.) P. G. Wilson in having narrowly oblong leaves and smaller flowers which are white in colour. In carpel number it provides a link between Urocarpus s.str. and Asterolasia F. Muell., supporting the suggestion that the latter genus should not be maintained.