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chelone

British  
/ kəˈləʊnɪ /

noun

  1. any plant of the hardy N American genus Chelone, grown for its white, rose, or purple flower spikes: family Scrophulariaceae

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of chelone

New Latin, from Greek chelōnē a tortoise, from a fancied resemblance between a tortoise's head and the shape of the flower