Definition of "sourwood"

sourwood

noun
plural sourwoods
1. A North American deciduous shrubby tree, of the genus Oxydendrum, having deep fissures in its bark, and sour-tasting leaves.
  Quotations
  I let him chew the tip of a burgundy leaf and taste how sourwood got its name.
  2021, Richard Powers, Bewilderment, Hutchinson Heinemann, page 17
2. An Australian tree, of the genus Hibiscus; the sorrel tree.