The Collaborative International Dictionary of English v.0.48:

goatsfoot \goatsfoot\ n.
   A short-stemmed South African plant (Oxalis caprina) with
   bluish flowers.

   Syn: goat's foot, Oxalis caprina.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

goatsfoot
    n 1: short-stemmed South African plant with bluish flowers [syn:
         goatsfoot, goat's foot, Oxalis caprina]