{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.