any of several species of coreopsis, especially Coreopsis tinctoria, a widely cultivated garden plant.
Origin of calliopsis
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Examples from the Web for calliopsis
Calliopsis (Coreopsis), yellow with red or brown center; two feet; mid-July, until killed by frost.A Woman's Hardy Garden|Helena Rutherfurd Ely
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