Chrysanthemum parthenium

from WordNet (r) 3.0 (2006)

Chrysanthemum parthenium
    n 1: bushy aromatic European perennial herb having clusters of
         buttonlike white-rayed flower heads; valued traditionally
         for medicinal uses; sometimes placed in genus Chrysanthemum
         [syn: {feverfew}, {Tanacetum parthenium}, {Chrysanthemum
         parthenium}]

from The Collaborative International Dictionary of English v.0.48

Pellitory \Pel"li*to*ry\, n. [Sp. pelitre, fr. L. pyrethrum. See
   {Bertram}.] (Bot.)
   (a) A composite plant ({Anacyclus Pyrethrum}) of the
       Mediterranean region, having finely divided leaves and
       whitish flowers. The root is the officinal pellitory, and
       is used as an irritant and sialogogue. Called also
       {bertram}, and {pellitory of Spain}.
   (b) The feverfew ({Chrysanthemum Parthenium}); -- so called
       because it resembles the above.
       [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Feverfew \Fe"ver*few\ (f[=e]"v[~e]r*f[=u]), n. [AS. feferfuge,
   fr. L. febrifugia. See {fever}, {Fugitive}, and cf.
   {Febrifuge}.] (Bot.)
   A perennial plant ({Pyrethrum Parthenium}, or {Chrysanthemum
   Parthenium}) allied to camomile, having finely divided leaves
   and white blossoms; -- so named from its supposed febrifugal
   qualities.
   [1913 Webster]