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ophis: flower heads, golden ragwort
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ophis: tubular involucre with 12-15 phyllaries in single series
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ophis: corymbose inflorescence
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ophis: upper cauline leaves clasping and dissected
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ophis: lower cauline leaves cordate and long-petioled
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ophis: leaves on stemless sterile shoots larger than on fertile stems
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ophis: fertile rhizome on left, sterile on right