1	"Leaves unifoliolate"	2
1	"Leaves trifoliolate"	3
2	"Stipules 3–5 mm long; leaf blades prominently serrated, lacking a conspicuous apical drip tip; 6.4–15.5 cm long, 2.2–5.5 cm wide; SE Qld"	"Ceratopetalum apetalum"
2	"Stipules 11.5–17 mm long; leaf blades entire to slightly serrated, usually with a conspicuous drip tip, 12.5–23.5 cm long, 6.6–8.7 cm wide; NE Qld"	"Ceratopetalum macrophyllum"
3	"Leaflets sessile, petiolules absent"	"Ceratopetalum corymbosum"
3	"Leaflets not sessile, petiolules  > 2 mm long"	4
4	"Stipules 1.8–3.4 mm long, distal connective protrusion of anthers strongly developed"	5
4	"Stipules 5–14.4 mm long, distal connective protrusion on anther weakly developed"	6
5	"Leaflets lanceolate to broadly ovate, midribs conspicuously raised on upper surface; central leaflet base decurrent"	"Ceratopetalum hylandii"
5	"Leaflets elliptical to obovate, midribs slightly or not raised on upper surface; central leaflet base cuneate"	"Ceratopetalum succirubrum"
6	"Leaflet midribs depressed on upper surface; fruits predominantly 5-winged; stipules broadly ovate, 5–6.5 mm long"	"Ceratopetalum virchowii"
6	"Leaflet midribs raised slightly on upper surface; fruits predominantly 4-winged; stipules triangular-lanceolate, 8–14.4 mm long"	"Ceratopetalum iugumensis"