The Collaborative International Dictionary of English v.0.48:

Paulownia \Pau*low"ni*a\, prop. n. [NL. So named from the
   Russian princess Anna Pavlovna.] (Bot.)
   A genus of trees of the order Scrophulariace[ae],
   consisting of one species, Paulownia imperialis.
   [1913 Webster]

   Note: The tree is native to Japan, and has immense
         heart-shaped leaves, and large purplish flowers in
         panicles. The capsules contain many little winged
         seeds, which are beautiful microscopic objects. The
         tree is hardy in America as far north as Connecticut.
         [1913 Webster]