Source : Webster's Revised Unabridged Dictionary (1913)

Lion's foot \Li"on's foot`\ (f[oo^]t`). (Bot.)
   (a) A composite plant of the genus {Prenanthes}, of which
       several species are found in the United States.
   (b) The edelweiss.

Source : WordNet®

lion's foot
     n : common perennial herb widely distributed in the southern and
         eastern United States having drooping clusters of pinkish
         flowers and thick basal leaves suggesting a lion's foot
         in shape; sometimes placed in genus Prenanthes [syn: {gall
         of the earth}, {Nabalus serpentarius}, {Prenanthes
         serpentaria}]