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Related to salverform: petaloid
Of or relating to a corolla having a slender tube that flares abruptly into a nearly flat portion at the open end, as in phlox.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Botany) (of the corolla of the phlox and certain other flowers) consisting of a narrow tube with flat spreading terminal petals
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014