1	Flowering shoot aphyllous, scapose (rarely 1-2 leaved)		(2)
+	Flowering shoots leafy, usually many leaved (rarely 1-2 leaved)		(13)
2 (1)	Seeds large, c.3 mm long; fruits 12-20 mm long. Leaves Long, needle-like		Draba hystrix
+	Seeds small usually c.1 (-2) mm or less long; fruits usually up to 10 mm long. Leaves not needle-like		(3)
3 (2)	Petals (4.5-) 5-6 mm long		(4)
+	Petals (1.5-) 2.5-4 mm long		(7)
4 (3)	Racemes 5-10-flowered (rarely 3 or 12 flowered) seeds c.1 mm long		(5)
+	Racemes 15-30-flowered (rarely less); seeds c.0.5 mm long		Draba olgae
5 (4)	Plants ± floccose-hairy with short, branched soft white hairs; siliculae usually 10-15 mm long		Draba tibetica
+	Plants ± ciliately hairy with simple and branched hairs; siliculae 3-8 mm long		(6)
6 (5)	Leaves with ± 3 longitudinal veins		Draba trinervis
+	Leaves with 1 mid-vein		Draba affghanica*
7 (3)	Plants, especially leaves, floccose with short, branched or simple soft whitish hairs		(8)
+	Plants ± ciliately hairy with simple or branched hairs		(9)
8 (7)	Siliculae 5-8 mm long, lanceolate or oblong-elliptic, somewhat contorted, compressed; style 1-1.5 mm long		Draba winterbottomii
+	Siliculae usually 3-4 (-5) mm long, ovoid, inflated; style c. 0.5 mm long		Draba korschinskyi
9 (7)	Petals c.2.5 mm long		Draba melanopus
+	Petals (3-) 4-6 mm long		(10)
10 (9)	Siliculae linear or elliptic-oblong, compressed		(11)
+	Siliculae ovoid or elliptic- ovate, sub inflated or Sub-compressed		(12)
11 (10)	Siliculae 5-10 mm long, 2.5-3.5 mm broad, oblong- elliptic; pedicel 4-6 mm long in fruit		Draba setosa
+	Siliculae (submature). Ovate-lanceolate c. 6 mm long, 2-3 mm broad; pedicel 8-10 mm long in fruit		Draba pakistanica
12 (10)	Petals 2.5-3 mm broad; basal leaves 3-5 mm long, 1 mm broad		Draba cachemirica
+	Petals c. 1.5 mm broad ; basal leaves (2.5-) 5-25 mm long, (1-) 2-3 (-4) mm broad		Draba oreades
13 (1)	Annuals		(14)
+	Perennials		(16)
14 (13)	Petals 1-2 mm long; siliculae 5-8 mm long, c. 2.5 (-3) mm broad, oblong-elliptic		(15)
+	Petals c. 4 mm long; siliculae 8-20 mm long c.2 mm broad		Draba stenocarpa
15 (14)	Racemes 3-5-flowered ; petals c. 1 mm long, about as long as sepals		Draba ellipsoidea
+	Racemes many flowered; petals c. 2 mm long, slightly longer than the sepals		Draba nemorosa
16 (13)	Seeds sub-biseriate, large, c.2 mm long, obscurely winged		Draba aubrietoides
+	Seeds biseriate, small, c. 1 mm long, not winged or margined		(17)
17 (16)	Plants not caespitose; stem usually decumbent, sparsely branched; fruits 10-20 mm long, 2.5-3 mm broad		Draba falconeri
+	Plants caespitose, usually erect and branched from the base; siliculae usually up to 10 mm long and 2 mm broad		(18)
18 (17)	Plants tomentose with short, branched white hairs (rarely mixed with long simple hairs)		(19)
+	Plants ± ciliately hairy with simple or branched hairs		(22)
19 (18)	Sepals persistent in fruit; siliculae 3-4 mm long, 2.5-3 mm broad, ovate-orbicular, not contorted, glaprous		Draba ludlowiana
+	Sepals caducous; siliculae (3.5-) 6-14 mm long, 1.5-2 mm broad, oblong-linear, ± pubescent and contorted		(20)
20 (19)	Homotrichous (with short and branched hairs)		(21)
+	Heterotrichous (short branched hairs mixed with simple or forked long hairs)		Draba lasiophylla
21 (20)	Seeds 16-20 in each locule		Draba lanceolata
+	Seeds 3-6 in each locule		Draba glomerata
22 (18)	Siliculae ovate-oblong, 2.5-5 mm long; pedicel 4-6 mm long in fruit racemes capitate, congested, up to 4 (-5) cm long in fruit		Draba altaica
+	Siliculae linear, 6-14 mm long; pedicel 15-25 (-30) mm long in fruit ; racemes lax, up to 15 cm long in fruit		Draba gracillima