1	"Fruit a siliqua (length, excluding beak, at least 3 times width)"	2
1	"Fruit a silicula (length, excluding beak, less than 3 times width)"	26
2	"Siliqua differentiated into valve and beak; cotyledons, conduplicate"	3
2	"Siliqua with valve region only (style persistent or not, but not developed into a beak); cotyledons not conduplicate"	9
3	"Seeds in two rows in each locule"	4
3	"Seeds in one row in each locule"	5
4	"Petals with purple veins; stigma bilobed; beak sabre-like"	Eruca
4	"Petals without purple veins; stigma capitate; beak conical to 2-edged"	Diplotaxis
5	"Siliqua indehiscent, constricted between the seeds, often breaking into 1-seeded units"	Raphanus
5	"Siliqua dehiscent, not constricted between the seeds, not breaking into 1-seeded units"	6
6	"Valves with 1 prominent mid-vein"	7
6	"Valves with 3 or more prominent veins"	8
7	"Valves slightly keeled; all leaves entire and stem-clasping"	Conringia
7	"Valves rounded; at least some leaves not entire or stem-clasping"	Brassica
8	"Siliqua spreading; beak cylindrical, conical or sabre-like"	Sinapis
8	"Siliqua appressed to the stem; beak swollen"	Hirschfeldia
9	"Plants with simple hairs, or glabrous"	10
9	"Plants with branched hairs"	17
10	"Seeds with incumbent radicle"	11
10	"Seeds with accumbent radicle"	15
11	"Septum incomplete or absent"	Menkea
11	"Septum complete"	12
12	"Seeds mucous"	13
12	"Seeds not mucous"	14
13	"Seeds finely papillose"	Arabidella
13	"Seeds finely reticulate"	Irenepharsus
14	"Valves with 3 veins"	Sisymbrium
14	"Valves with 1 indistinct vein"	Irenepharsus
15	"Siliqua valves flat; replum margin flanged"	Cardamine
15	"Siliqua valves convex; replum margin not flanged"	16
16	"Valves with the mid-vein distinct to the apex"	Barbarea
16	"Valves with the mid-vein facing below the apex"	Rorippa
17	"Seeds in 1 row in each locule"	18
17	"Seeds in 2 rows in each locule"	21
18	"Petals 10 mm long or longer"	19
18	"Petals less than 10 mm long"	20
19	"Stigma deeply bilobed; lobes erect, each with a dorsal swelling or horn"	Matthiola
19	"Stigma not deeply bilobed; lobes without a swelling or horn"	Erysimum
20	"Leaves bi- to tripinnatisect; petals yellow"	Descurainia
20	"leaves entire to dentate; petals white"	Irenepharsus
21	"Siliqua 2 cm long or longer"	Blennodia
21	"Siliqua less than 2 cm long"	22
22	"Siliqua subterranean"	Geococcus
22	"Siliqua aerial"	23
23	"Petals thread-like, not clawed"	Stenopetalum
23	"Petals obtuse, somewhat clawed"	24
24	"Siliqua linear; petals white"	Pachymitus
24	"Siliqua fusiform; petals yellow or with some lavender"	25
25	"Pedicels recurved; petals yellow"	Scambopus
25	"Pedicels erect to spreading; petals with some lavender"	Harmsiodoxa
26	"Silicula distinctly differentiated into 2 parts (valve region and beak)"	27
26	"Silicula not distinctly differentiated into valve region and beak"	31
27	"Beak flattened and leaf-like"	Carrichtera
27	"Beak rounded to conical"	28
28	"Silicula more than 10 mm long"	Cakile
28	"Silicula less than 10 mm long"	29
29	"Beak or upper segment containing seeds"	Rapistrum
29	"Beak seedless"	30
30	"Plant glabrous; silicula obcordate"	Myagrum
30	"Plant hairy; silicula not obcordate"	Euclidium
31	"Silicula with one seed per locule"	32
31	"Silicula with more than one seed per locule"	37
32	"Silicula with a narrow septum and keeled valves"	33
32	"Silicula with a broad septum and flat or rounded valves"	36
33	"Silicula dehiscent"	Lepidium
33	"Silicula indehiscent but sometimes breaking into 1-seeded units"	34
34	"Silicula smooth"	Cardaria
34	"Silicula warted and/or papillose and/or pitted"	35
35	"Flowers regular"	Coronopus
35	"Flowers zygomorphic, with 2 petals much larger than the other 2"	Iberis
36	"Silicula globose"	Neslia
36	"Silicula flattened"	Lobularia
37	"Silicula with a narrow replum; valves winged or keeled"	38
37	"Silicula with a broad replum; valves not winged or keeled"	44
38	"Plants glabrous or with simple hairs only"	39
38	"Plants hairy, at least some of the hairs branched"	42
39	"Silicula winged"	Microlepidium
39	"Silicula keeled"	40
40	"Seeds many, up to 70 per locule"	Carinavalva
40	"Seeds few, 12 or fewer per locule"	41
41	"Silicula elongate; branching of stem zigzag"	Hymenolobus
41	"Silicula round; branching of the stem not zigzag"	Cuphonotus
42	"Hairs all 2-fid"	Phlegmatospermum
42	"Simple and stellate hairs present"	43
43	"Silicula more than 5 mm long"	Capsella
43	"Silicula less than 5 mm long"	Microlepidium
44	"Petals thread-like, acute, or 2-fid"	45
44	"Petals somewhat obtuse (or emarginate), entire"	46
45	"Petals entire, thread-like and/or acute"	Stenopetalum
45	"Petals 2-fid"	Erophila
46	"Silicula with septum incomplete or absent"	Menkea
46	"Silicula with septum complete"	47
47	"Silicula subterranean"	Geococcus
47	"Silicula aerial"	48
48	"Staminal filaments with an appendage; hairs stellate, not appressed"	Alyssum
48	"Staminal filaments without an appendage; hairs, if stellate, not appressed"	49
49	"Hairs absent or all simple"	Rorippa
49	"Hairs present, at least some branched"	Camelina