Iberis

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  I. amara

  1a. Leaf blades usually with few and distant, irregular, large teeth (rarely entire); siliques 3–5 mm long; stems hirsute, at least on the lower portion; axis of the inflorescence elongating in fruit, the infructescence resembling a raceme
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  1b. Leaf blades entire or nearly so; siliques 5.5–7 (–10) mm long; stems glabrous; axis of the inflorescence elongating or not
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    I. sempervirens

    2a. Plants perennial, with evergreen leaves; petals white (sometimes tinged with lilac); 
axis of the inflorescence elongating in fruit, the infructescence resembling a raceme
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    I. umbellata

    2b. Plants annual, with deciduous leaves; petals pink to purple; axis of the inflorescence not or scarcely elongating in fruit, the infructescence resembling an umbel

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