clustered bellflower

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Noun1.clustered bellflower - bellflower of Europe to temperate Asia having dense spikes of violet-blue to white flowers
bellflower, campanula - any of various plants of the genus Campanula having blue or white bell-shaped flowers
References in periodicals archive ?
Its relatives include the clustered bellflower of chalk and limestone grassland, the harebell of cliff-tops and old grassland, and several taller bellflowers which are commonly cultivated in gardens.