Grevillea diffusa ssp.costablei Makinson

Leaves usually less than 7 cm long, 2.5–4 mm or occasionally 7 mm wide, margins recurved. Peduncles 10–15 mm long. Perianth and style dark red to dark burgundy. Shrub 1–2 m high. Waterfall, Helensburgh Georges River area. Often near creeks. Ss. DSF. Fl. winter–spring