Source : Webster's Revised Unabridged Dictionary (1913)

Chelone \Che*lo"ne\, n. [Gr. chelw`nh a tortoise. So named from
   shape of the upper lip of the corolla.] (Bot.)
   A genus of hardy perennial flowering plants, of the order
   {Scrophulariace[ae]}, natives of North America; -- called
   also {snakehead}, {turtlehead}, {shellflower}, etc.

Source : WordNet®

Chelone
     n : herbaceous perennials: shellflower [syn: {genus Chelone}]