dictamnus

from WordNet (r) 3.0 (2006)

Dictamnus
    n 1: a dicotyledonous genus of the family Rutaceae [syn:
         {Dictamnus}, {genus Dictamnus}]

from The Collaborative International Dictionary of English v.0.48

Dictamnus \Dic*tam"nus\ (d[i^]k*t[a^]m"n[u^]s), n. [L. See
   {Dittany}.] (Bot.)
   A suffrutescent herb, {Dictamnus Fraxinella} (the only
   species), with strong perfume and showy flowers. The volatile
   oil of the leaves is highly inflammable.
   [1913 Webster]