Chelone

from WordNet (r) 3.0 (2006)

Chelone
    n 1: herbaceous perennials: shellflower [syn: {Chelone}, {genus
         Chelone}]

from The Collaborative International Dictionary of English v.0.48

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.
   [1913 Webster]