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Key to Cyanus

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1 Plant perennial; pappus bristles 0.5-1.5 mm long
1 Plant annual; pappus bristles 2-8 mm long.
..2 Lower leaves oblong, obtuse; phyllary appendages silvery white to brown, the teeth 1.5-2.0 mm long; pappus 6-8 mm long
..2 Lower leaves lanceolate, acute; phyllary appendages white to dark brown or black, the teeth ca. 1 mm long; pappus 2-4 mm long
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