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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Arabidopsis

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1 Fruit strongly flattened; petals (4-) 5-8 (-10) mm long; seeds 0.9-1.1 mm long; [native perennial, of calcareous and mafic rock outcrops]
1 Fruit terete; petals 2-4 mm long; seeds 0.3-0.5 mm long; [exotic annual, of disturbed, weedy sites]
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