Source : Webster's Revised Unabridged Dictionary (1913)

Portulacaceous \Por`tu*la*ca"ceous\, a. (Bot.)
   Of or pertaining to a natural order of plants
   ({Portulacace[ae]}), of which Portulaca is the type, and
   which includes also the spring beauty ({Claytonia}) and other
   genera.

Claytonia \Clay*to"ni*a\, n. [Named after Dr.John Clayton, an
   American botanist.] (Bot.)
   An American genus of perennial herbs with delicate blossoms;
   -- sometimes called {spring beauty}.

Source : WordNet®

Claytonia
     n : genus of mainly North American succulent herbs with white or
         pink flowers usually in terminal racemes [syn: {genus
         Claytonia}]