Source : Webster's Revised Unabridged Dictionary (1913)

Pigeonfoot \Pi"geon*foot`\, n. (Bot.)
   The dove's-foot geranium ({Geranium molle}).

Source : WordNet®

Geranium molle
     n : western geranium with small pink flowers; a common weed on
         lawns and in vacant lots [syn: {dove's foot geranium}]