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ophis: male winter twigs, red maple
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ophis: male 1st year twig, red maple
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ophis: male 4th year spur twig, red maple
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ophis: sectioned lateral buds from 1st year twigs, red maple
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ophis: sectioned apical and lateral buds, 1st year twig, red maple
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ophis: 2nd year male twig in winter, red maple
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ophis: 2nd and 6th year twigs, red maple