This section is from the book "A Guide To The Poisonous Plants And Weed Seeds Of Canada And The Northern United States", by Robert Boyd Thomson, H. B. Sifton. Also available from Amazon: A guide to the poisonous plants and weed seeds of Canada and the northern United States.
The Fetter-bush, Andromeda polifolia L., contains andromedodextrin, a narcotic poison, in its leaves. Pam-mel states that it has been known to poison sheep. It is a shrub six inches to two feet high, growing in bogs throughout the country. Its small, oblong, leathery leaves have strongly revolute margins, and are white woolly beneath. The drooping umbels each contain only a few delicately coloured pink flowers.