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ophis: leaf scar, 1st year twig, black locust
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ophis: adjacent leaf scars, 1st year twig
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ophis: ridged summit, 1st year twig
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ophis: elongate 1st year twig
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ophis: partially healed wounds, 1st yr twig
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ophis: 2nd year twig with 1st year twigs originating from upper nodes
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ophis: 2nd year twig with cortex split longitudinally
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ophis: 2nd year twig with three 1st year offshoots