Source : Webster's Revised Unabridged Dictionary (1913)

Throatwort \Throat"wort`\, n. (Bot.)
   A plant ({Campanula Trachelium}) formerly considered a remedy
   for sore throats because of its throat-shaped corolla.

Source : WordNet®

Campanula trachelium
     n : European bellflower with blue-purple to lilac flowers
         formerly used to treat sore throat [syn: {throatwort}, {nettle-leaved
         bellflower}]