Dictionary.com
Thesaurus.com

asepalous

American  
[ey-sep-uh-luhs] / eɪˈsɛp ə ləs /

adjective

  1. (of a flower) without sepals.


asepalous British  
/ æˈsɛpələs /

adjective

  1. (of a plant or flower) having no sepals

"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