whitlowwort

from WordNet (r) 3.0 (2006)

whitlowwort
    n 1: any of various low-growing tufted plants of the genus
         Paronychia having tiny greenish flowers and usually whorled
         leaves; widespread throughout warm regions of both Old and
         New Worlds; formerly thought to cure whitlows (suppurative
         infections around a fingernail)

from The Collaborative International Dictionary of English v.0.48

Whitlow-wort \Whit"low-wort`\, n. (Bot.)
   Same as {Whitlow grass}, under {Whitlow}.
   [1913 Webster]