Source : Webster's Revised Unabridged Dictionary (1913)

Water speedwell \Wa"ter speed"well\ (Bot.)
   A kind of speedwell ({Veronica Anagallis}) found in wet
   places in Europe and America.

Source : WordNet®

water speedwell
     n : plant of wet places in Eurasia and America [syn: {Veronica
         michauxii}, {Veronica anagallis-aquatica}]