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ophis: 1st year twig, sugar maple
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ophis: 1st and 2nd year twigs, sugar maple
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ophis: 1st and 2nd year twigs, sugar maple
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ophis: lateral buds and leaf scars, 1st year twig, sugar maple
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ophis: granular algae at base of 2nd year twig, sugar maple
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ophis: foliose lichens to 2 mm on decaying terminal bud, 5th year twig
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ophis: cut 1st and 3rd year twigs, sugar maple