1	Leaves compound		(2)
+	Leaves simple		(3)
2 (1)	Fruit a samara. Leaflets serrate or crenate, rarely entire		Fraxinus
+	Fruit a berry or a capsule. Leaflets mostly entire		(8)
3 (1)	Corolla tube orange-red lobes whitish. Leaves covered with short, stiff hairs		Nyctanthes
+	Corolla tube of the same colour as the lobes. Leaves if pubescent, not covered with stiff hairs		(4)
4 (3)	Corolla 3-5 mm in diameter, creamy-white, some times greenish; tube up to 3 mm long. Fruit a drupe		(5)
+	Corolla 5-35 mm in diameter, white, yellow or red-lilac; tube 5-20 mm long. Fruit a berry or a capsule		(8)
5 (4)	Leaves lanceolate to ovate, densely covered with minute whitish or reddish scales, more on the lower surface. Small tree of greyish-green appearance		Olea
+	Leaves ovate green, sometimes shining not densely covered with scales. Trees or shrubs, not greyish		(6)
6 (5)	Leaves bearing glands (domatia) at the axils of nerves		Olea
+	Leaves without such glands		(7)
7 (6)	Flowers in short racemes or fascicles. Drupe 1-seeded		Osmanthus
+	Flowers in thyrsoid panicles. Drupe with 1-3 seeds, resembling a berry		Ligustrum
8 (4)	Fruit a berry. Corolla lobes (4-) 5-10; flowers solitary, in cymes or fascicles		Jasminum
+	Fruit a capsule. Corolla lobes 4; flowers solitary, in panicles or fascicles		(9)
9 (8)	Corolla tube longer than the lobes, red-lilac or white. Leaves Simple, entire or pinnatifid		Syringa
+	Corolla deeply divided, yellow; tube much chorter than the lobes. Leaves simple, serrate, trilobed or trifoliolate		Forsythia