Red sorrel —
A malvaceous plant (Hibiscus Sabdariffa) whose acid calyxes and capsules are used in the West Indies for making tarts and acid drinks
Salt of sorrel —
binoxalate of potassa; -- so called because obtained from the juice of Rumex Acetosella, or Rumex Axetosa.
Sorrel tree —
a small ericaceous tree (Oxydendrum arboreum) whose leaves resemble those of the peach and have a sour taste. It is common along the Alleghanies. Called also sourwood.