1	Leaves compound, trifoliolate or pinnate		(2)
+	Leaves simple		(10)
2 (1)	Leaves alternate, flowers yellow		(3)
+	Leaves opposite, flowers white or yellow		(5)
3 (2)	The whole plant glabrous		(4)
+	Branches, leaves and calyx teeth pubsecent		Jasminum humile forma pubigerum
4 (3)	Leaflets usually 3-5. Flowers scentless. Plants wild, with berries. Occasionally cultivated		Jasminum humile
+	Leaflets usually 5-7. Flowers fragrant. Plants sterile. Cultivated		Jasminum humile cultivar ‘revolutum’
5 (2)	Flowers yellow. Leaves trifoliolate		Jasminum mesnyi
+	Flowers white. Leaves trifoliolate or pinnate		(6)
6 (5)	Calyx teeth minute		(7)
+	Calyx teeth nearly as long as the corolla tube, 5-15 mm long		(9)
7 (6)	Leaves grey-pubescent; lateral leaflets much reduced or lacking		Jasminum auriculatum
+	Leaves glabrous or glabrate, green; lateral leaflets well developed but not always as long as the terminal		(8)
8 (7)	Leaves trifoliolate; leaflets ovate, not coriaceous		Jasminum azoricum
+	Leaves trifoliolate or pinnate; leaflets cordate or subcordate to lanceolate, coriaceous		Jasminum dispermum
9 (6)	Inflorescence subumbellate; corolla tube 15-17 mm long, the lobes 9-12 mm long, 5-8 mm broad. Common, wild		Jasminum officinale
+	Inflorescence cymose; pedicels of subsequent flowers exceeding the first and the central ones; corolla tube 15-23 mm long, the lobes 15-20 mm long, 8-14 mm broad. Cultivated		Jasminum grandiflorum
10 (1)	Entire plant glabrous. Leaves coriaceous, shining		Jasminum cuspidatum
+	Plant pubescent, at least the calyx. Leaves not Coriaceous		(11)
11 (10)	Calyx teeth 0-3(-4) mm long		(12)
+	Calyx teeth 5 mm and longer		(15)
12 (11)	Calyx almost truncate, teeth less than 1 mm long. Leaves sometimes with 2 small, stipulelike lateral leaflets		Jasminum auriculatum
+	Calyx teeth usually longer than 1 mm. Leaves never trifoliolate		(13)
13 (12)	Leaves up to 6 cm long, velvety tomentose on both Sides; petiole up to 1 cm long		Jasminum roxburghianum
+	Leaves up to 18 cm long, pubescent when young, later glabrescent; petiole 1-2.5 cm long		(14)
14 (13)	Shrub not twining		Jasminum arborescens
+	Shrub twining. leaves unusually large		Jasminum latifolium
15 (11)	Flowers in few-flowered terminal cymes, fragrant, often double, not tinged with red outside. Leaves elliptic or broad-elliptic to suborbicular, sometimes in whorls or 3; acute leaves with ± cuneate base		Jasminum sambac
+	Flowers in dense terminal or axillary cymes or single, fragrant or not, sometimes tinged with red outside. Leaves ovate, usually acuminate, base truncate to cordate		(16)
16 (15)	Flowers fragrant; cymes sometimes axillary or on dwarf Lateral branchlets. Calyx fulvous-villous, teeth almost as long as the corolla tube. Frequently cultivated		Jasminum multiflorum
+	Flowers scentless; cymes terminal, Calyx pubescent, teeth of about half the length of the corolla tube. Rarely cultivated		Jasminum amplexicaule