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Celastrina argiolus (Holly Blue) is a species of butterflies in the family gossamer-winged butterflies. They visit flowers of bunchberry dogwood, roughleaf coneflower, Corydalis repens, and whitetip clover. They are diurnal.

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EOL has data for 9 attributes, including:

Known occurrences, collected specimens and observations of holly blue. View this species on GBIF