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
see also:
sour rumex rumex acetosa rumex acetosella mountain sorrel mountain 
red sorrel hibiscus sabdariffa rumex acetosella sheep sorrel salt of sorrel 
rumex axetosa sorrel tree oxydendrum arboreum sourwood wood sorrel 

oxydendrum arboreum
     n : deciduous shrubby tree of eastern north america having
         deeply fissured bark and sprays of small fragrant white
         flowers and sour-tasting leaves syn: sorrel tree, sourwood,
          titi
see also:
sorrel tree sourwood titi