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Woodwax or Dyer's Greenweed (Genista tinctoria) (mentioned in "Alice Doane's Appeal")

Also known as Dyer's Weed, Woad Waxen, and Dyer's Broom (Genista tinctoria).
(courtesy of http://www.botanical.com/botanical/mgmh/b/brodye72.html)
citation: http://www.hawthorneinsalem.org/images/image.php?name=MMD2153