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Related to moss rose: portulaca
[Sense 1, from the mosslike appearance of the resinous hairs on the calyx and peduncle . Sense 2, from the fact that the plant grows in mosslike mats .]
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.
(Plants) a variety of rose, Rosa centifolia muscosa, that has a mossy stem and calyx and fragrant pink flowers
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a cabbage rose, Rosa centrifolia muscosa, having a mosslike growth on the calyx and stem.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.