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 

red sorrel
     n : east indian sparsely prickly annual herb or perennial
         subshrub widely cultivated for its fleshy calyxes used in
         tarts and jelly and for its bast fiber syn: roselle, rozelle,
          sorrel, jamaica sorrel, hibiscus sabdariffa
see also:
roselle rozelle sorrel jamaica sorrel hibiscus sabdariffa