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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 Valerianella

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1 Corollas pale lavender to pink; calyx with irregular, ovate projections; leaves lanceolate, tapering to the tip
1 Corollas white to pale blue; calyx lacking projections; leaves oblong to spatulate, not tapering for most of their length towards the tip.
..2 Fruit greatly thickened by a corky mass on the back of the fertile locule; corolla pale blue (or white)
..2 Fruit lacking a corky mass on the back of the fertile locule; corolla white.
....3 Fertile locule much wider than the combined width of the 2 sterile locules; fruit sharply triangular in ×-section
....3 Fertile locule slightly wider or narrower than the combined width of the 2 sterile locules; fruit not sharply triangular in ×-section.
......4 Corolla 1.5-2 mm long, the corolla lobes 0.4-0.8 mm long
......4 Corolla 3-5 mm long, the corolla lobes 1-2 mm long
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