They may have been tagged incorrectly by the grower or nursery. Have you taken a flower to the garden center where you purchased the hydrangeas for help with identifying them? Or, just send me a photo of both the flowers and leaves. Our collection page has images that might also be helpful.
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What does pink tipped white roses mean? - Quora
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The house of Mirth, by Edith Wharton—A Project Gutenberg eBook