bog rosemary

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of several evergreen shrubs of the genus Andromeda, having pink or white urn-shaped flowers grouped in nodding umbels.

Wiktionary

1. n. Any shrub in the genus Andromeda, especially Andromeda polifolia.

WordNet 3.0

1. n. wiry evergreen shrub having pendent clusters of white or pink flowers; of wet acidic areas in Arctic and Canada to northeastern United States