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| 1 |
Siliquae ± compressed or flattened, with valves ± flat or terete |
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(2) |
| + |
Siliquae subcylindrical or subcompressed, sometimes ellipsoid, with valves ± convex |
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(8) |
| |
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| 2 (1) |
Valves usually opening suddenly and coiling spirally
upwards; leaves usually pinnate |
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Cardamine |
| + |
Valves not opening like above; leaves entire to sinuate or dentate (very rarely lyrate or pinnate) |
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(3) |
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| 3 (2) |
Plants robust with basal leaves soon withering; siliquae elongated, ± appressed to stem |
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Turritis |
| + |
Plants usually not so tall and the basal leaves not withering soon ; siliquae short (rarely long), ± spreading or ascending |
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(4) |
| |
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| 4 (3) |
Leaves usually deeply sinuate-dentate; flowers bright yellow |
|
Barbaraea |
| + |
Leaves entire or toothed above; flowers white, lilac or rarely mauve-yellow or yellowish |
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(5) |
| |
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| 5 (4) |
Basal leaves usually short, spathulate or obovate, 3,5 (-10)-lobulate or toothed above (rarely entire or subentire), often villous with simple or forked hairs |
|
Christolea |
| + |
Basal leaves usually elongated, oblanceolate or oblong-obovate, entire, dentate or sinuate-dentate, ± hairy with simple and branched hairs (rarely villous) |
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(6) |
| |
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| 6 (5) |
Siliquae short (up to 2 cm long), linear, usually contorted densely covered with minute branched or stellate hairs, tardily dehiscent |
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Phaeonychium |
| + |
Siliquae usually elongated and strongly compressed, mostly not contorted, glabrous (rarely hairy ), dehiscent |
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(7) |
| |
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| 7 (6) |
Flowers small, subsessile, yellow. Plants annual, small with radical leaves only stigma sessile or subsessile |
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Drabopsis |
| + |
Flowers mediocre or large, usually white, pedicellate. Plants perennial, usually tall, leafy (rarely scapose); stigma on a distinct style |
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Arabis |
| |
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|
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| 8 (1) |
Scapes 1-flowered; leaves radical only |
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Pegaeophyton |
| + |
Racemes many flowered; stem leafy |
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(9) |
| |
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|
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| 9 (8) |
Flowers yellow |
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Rorippa |
| + |
Flowers white or lilac |
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(10) |
| |
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| 10 (9) |
Plants terrestrial, glandular-hairy; leaves simple, toothed; fruits elongated, straight |
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Dontostemon |
| + |
Plants aquatic, glabrous or sparsely hairy with simple hairs; leaves pinnate; fruits short, often slightly curved |
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Nasturtium |
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