1	"Leaves thicker or about as thick as wide, sessile or with a petiole bordered by the blade. Flowers ± sessile. Sepals erect, acuminate, longer than petals. Occurring in N.T. (N of Jabiru)"	"Ochrosperma sulcatum"
1	"Leaves wider than thick, with a petiole 0.3–1 mm long. Flowers with a distinct peduncle and/or pedicel 0.3–1.2 mm long. Sepals incurved, obtuse, shorter than petals. Occurring in Qld and N.S.W."	2
2	"Leaves linear or very narrowly ovate, 0.5–1.1 mm wide"	3
2	"Leaves narrowly obovate to broadly elliptic, 0.8–3 mm wide"	4
3	"Stamens 6–9 per flower. Peduncles 0.5–0.8 mm long. Pedicels ± absent. Petals 1.5–2.5 mm long. Fruits 3.3–4 mm diam. (Townsville–near Tambo, Qld)"	"Ochrosperma adpressum"
3	"Stamens 5 per flower. Peduncles 0.1–0.2 mm long. Pedicels 0.3–0.5 mm long. Petals 0.8–1.2 mm long. Fruits 2–2.7 mm diam. (Bundaberg, Qld–near Port Macquarie, N.S.W.)"	"Ochrosperma lineare"
4	"Leaves 1.6–3 mm wide, discolorous. Petals 1.8–2.5 mm long. Mature style more than 1.5 mm long. (near Rylstone–Katoomba, N.S.W.)"	"Ochrosperma oligomerum"
4	"Leaves 0.8–1.8 mm wide, concolorous. Petals 0.8–1.3 mm long. Mature style less than 1.5 mm long"	5
5	"Leaves not lemon-scented. Peduncles up to 0.3 mm long. Pedicels 0.6–1.2 mm long. Seeds c. 1.5 mm long. (near Brovinia–near Rolleston, Qld)"	"Ochrosperma obovatum"
5	"Leaves lemon-scented. Peduncles 0.3–0.5 mm long. Pedicels 0.4–0.5 mm long. Seeds 0.9–1.1 mm long. (Lismore–near Port Macquarie, N.S.W.)"	"Ochrosperma citriodorum"