lithops

from WordNet (r) 3.0 (2006)
lithops
    n 1: any plant of the genus Lithops native to Africa having
         solitary yellow or white flowers and thick leaves that
         resemble stones [syn: {lithops}, {living stone},
         {stoneface}, {stone-face}, {stone plant}, {stone life
         face}, {flowering stone}]
    

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