The Spiræa opulifolia.
1796. A variety of plum trees, nine bark spice, and leather-wood bushes.—Morse, ‘American Geography,’ i. 576. (N.E.D.)
1829. Thickets of arrow-wood, nine-bark, and various other shrubs.—John P. Kennedy, ‘Swallow Barn,’ p. 131 (N.Y., 1851).
1859. Nine-bark, a low shrub found in Maine, Canada, &c. Its old bark is loose, and separates in thin layers (Bartlett).
