Hibiscus Sabdariffa

Sorrel Sor"rel, n. [F. surelle, fr. sur sour, fr. OHG. s?r sour. See {Sour}.] (Bot.) One of various plants having a sour juice; especially, a plant of the genus {Rumex}, as {Rumex Acetosa}, {Rumex Acetosella}, etc. [1913 Webster]

{Mountain sorrel}. (Bot.) See under {Mountain}.

{Red sorrel}. (Bot.) (a) A malvaceous plant ({Hibiscus Sabdariffa}) whose acid calyxes and capsules are used in the West Indies for making tarts and acid drinks. (b) A troublesome weed ({Rumex Acetosella}), also called {sheep sorrel}.

{Salt of sorrel} (Chem.), binoxalate of potassa; -- so called because obtained from the juice of {Rumex Acetosella}, or {Rumex Axetosa}.

{Sorrel tree} (Bot.), 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}.

{Wood sorrel} (Bot.), any plant of the genus Oxalis. [1913 Webster]