1	Bulbs with a narrow, more or less cylindrical distinct rhizome		(23)
+	Bulbs broadly ovoid to subglobose, without a distinct rhizome		(2)
2 (1)	Outer bulb coats distinctly reticulately fibrous		(3)
+	Outer bulb coats scaly, papery or coriaceous, with to pinkish or grey to brownish		(6)
3 (2)	Scape 4-10 cm long. leaves circinate or flexuous		Allium stocksianum
+	Scape more than 10 cm long. Leaves neither circinate nor flexuous		(4)
4 (3)	Leaves not fistular, pilose		Allium longicollum
+	Leaves fistular, glabrous to scabrid		(5)
5 (4)	Leaves 3-8, filiform to linear, 1-2 mm broad, up to as long as the plants. Tepals white to rose coloured, veins rose-purple		Allium borszczowii
+	Leaves 2-3, filiform, semicylindric, shorter than the plants. Tepals white with greenish veins		Allium filidens
6 (2)	Bulb coats scaly or papery		(7)
+	Bulb outer coats coriaceous, striate or with parallel to reticulate veins		(15)
7 (6)	Stamens longer than tepals		(8)
+	Stamens as long as or shorter than tepals		(9)
8 (7)	Bulb c. 1 cm broad. Leaves 2, 1.5-3 mm broad Inner filaments (3-) 5-cuspidate		Allium micranthum
+	Bulb 3-4 cm broad. Leaves 6-12, 1-2 cm broad. Inner filaments 3-cuspidate		Allium porrum
9 (7)	Flowers white. Leaves flate, keeled, not fistular. plants cultivated		(10)
+	Flowers rose coloured to purple or violet. Leaves fistular or not fistular		(11)
10 (9)	Bulbs with 6-10 large scaly bulbils. Inner filaments toothed		Allium sativum
+	Bulbs round without scaly bulbils. Filaments entire		Allium neapolitanum
11 (9)	Leaves up to 1 cm broad. Scape less than 50 cm long		(12)
+	Leaves 1-5 cm broad. Scape c. 1 m long		(14)
12 (11)	Leaves filiform, less than 2 mm broad		Allium caesioides
+	Leaves linear, 2-9 mm broad		(13)
13 (12)	Tepals 8-11 mm long, ovate. Filaments triangular, about half the length of the tepals		Allium oreophilum
+	Tepals 4-6 mm long, lanceolate. Filaments about 3/4 the length of the tepals		Allium chitralicum
14 (11)	Leaves glabrous		Allium rosenbachianum
+	Leaves, especially below in the lower part, pilose		Allium stipitatum
15 (6)	Leaves up to 5 mm broad. stamen filaments included		(16)
+	Leaves 1-3 cm broad. Stamen filaments exserted		(22)
16 (15)	Pedicels 3-4 cm long. Umbels few flowered. Inner filaments more or less distinctly 2-toothed; teeth short, rounded		Allium gillii
+	Pedicels 0.5-3 mm long. Umbels many flowered. filaments entire		(17)
17 (16)	Filaments less than half the length of tepals		(18)
+	Filaments about 3/4 the length of tepals		(19)
18 (17)	About 2/3 of the filaments united, upper parts free. Inner tepals gibbous at the base. Umbel without bulbils		Allium griffithianum
+	About 1/4 of the filaments united at the base, upper 3/4 of the filaments free. Inner tepals not gibbous at the base. Umbel usually with bulbils		Allium umbilicatum
19 (17)	Tepals about 1 cm long, obtuse. Leaf sheaths 3- winged		Allium tripterum
+	Tepals 3-6 mm long, acute or obtuse. Leaf sheaths not winged		(20)
20 (19)	Tepals 5-6 mm long, white, veins reddish, acute. Inner filaments broadly ovate		Allium lamondiae
+	Tepals 3-5 mm long, white or rose, acute or obtuse. Inner filaments triangular
21	Tepals pink coloured, acute. Leaf sheaths glabrous		24 Allium jacquemontii
+	Tepals white to pinkish, obtuse. Leaf sheaths pubescent		Allium miserabile
22 (15)	Scape c. 1 m long. Pedicels up to 3 cm long. Tepals 5-6 mm long		Allium macleanii
+	Scape 10-20 cm long, stout. Pedicels 3-9 cm long, Vary unequal. Tepals 7-8 mm long		Allium caspium
23 (1)	bulbs with membranous, scaly or coriaceous, Striate coats		(24)
+	Bulbs with distinct fibrous, reticulate coats		(31)
24 (23)	Filaments shorter than tepals		(25)
+	Filaments as long as or longer than tepals		(26)
25 (24)	Tepals pink. All filaments entire, connate for 1/3 to 1/4 of their length		Allium schoenoprasum
+	Tepals yellow. Inner filaments slightly obtusely toothed, connate for more than half their lengths		Allium fedtschenkoanum
26 (24)	Tepals white or greenish-white		(27)
+	Tepals cream coloured to golden-yellow or rose coloured to reddish		(28)
27 (26)	Scape fistular, inflated in the middle. Tepals greenish-white. Cultivated		Allium cepa
+	Scape neither fistular nor inflated. Tepals white		Allium farctum
28 (26)	Bulb coats membranous, reddish-brown. Inner filaments 2-toothed at the base		Allium roylei
+	Bulb coasts coriaceous, brown. All filaments entire		(29)
29 (28)	Leaves filiform, up to 1 mm broad, apex acute		Allium filifolium
+	Leaves linear to lanceolate, 2-15 mm broad, apex obtuse		(30)
30 (29)	Tepals yellow, sometimes pink. Leaves 3-5, linear, 2-3 mm broad		Allium consanguineum
+	Tepals rose coloured. Leaves 5-6, broadly linear, falcate, 5-15 mm broad		Allium carolinianum
31 (23)	Filaments exserted		(40)
+	Filaments as long as or shorter than tepals		(32)
32 (31)	Leaves 1-2 cm broad		Allium gilgiticum
+	Leaves less than 1 cm broad		(33)
33 (32)	Filaments as long as tepals. Style exserted		Allium dolichostylum
+	Filaments shorter than tepals. Style included		(34)
34 (33)	Tepals whit, 4-5 mm long, oblong Inner filaments broad, each with an unilateral tooth		Allium baluchistanicum
+	Tepals white to pink or purple to dark purple, oblong, elliptic to ovate or lanceolate, 5 or more mm long. Filaments narrow to broad, entire or toothed		(35)
35 (34)	Tepals acute to acuminate or mucronate		(36)
+	Tepals acute to obtuse. Filaments up to 1/2 the length of tepals		(38)
36 (35)	Tepals white, rarely pink, 6-10 mm long, elliptic. Filaments c. 2/4 the length of tepals. Inner filaments narrowly triangular		Allium tuberosum
+	Tepals pink 5-8 mm long, oblong to lanceolate. Filaments 1/2 to 2/3 the length of tepals. Inner filaments broadly triangular to oblong		(37)
37 (36)	Tepals c. 8 mm long, acuminate. Inner filaments broadly triangular		Allium barszczewskii
+	Tepals 5-6 mm long, apex with a recurved mucro. Inner filaments broadly flattened to oblong		Allium oreoprasum
38 (35)	Tepals white, 7-10 mm long, obtuse. Filaments linear to narrowly triangular		Allium humile
+	Tepals dark purple, 6-7 mm long, obtuse to acute. filaments triangular		(39)
39 (38)	Filaments c. half the length of tepals; anthers mucronate leaves filiform, convolute, acute		Allium tenuicaule
+	Filaments less than half the length of tepals; anthers not mucronate. Leaves cylindrical, fistular, 1-3 mm broad, obtuse		Allium atrosanguineum
40 (31)	Bulb reddish. Tepals pink to purple, c. 6 mm long, oblong to lanceolate. Leaves linear, c. 1 mm broad		Allium stoliczki
+	Bulb brownish. Tepals white to yellowish-white, c. 5 mm long, oblong. Leaves broadly lanceolate to oval		Allium victorialis