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Having a bilaterally symmetrical corolla somewhat resembling a butterfly, characteristic of certain plants of the pea family such as a sweet pea.

[Latin pāpiliō, pāpiliōn-, butterfly; see pavilion + -aceous.]
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.


shaped or in the form of a butterfly
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(pəˌpɪl i əˈneɪ ʃəs)

having an irregular corolla shaped like a butterfly, as the pea and other leguminous plants.
[1660–70; < Latin pāpiliōn- (s. of pāpiliō) butterfly + -aceous]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in classic literature ?
Many flowers, on the other hand, have their organs of fructification closely enclosed, as in the great papilionaceous or pea-family; but in several, perhaps in all, such flowers, there is a very curious adaptation between the structure of the flower and the manner in which bees suck the nectar; for, in doing this, they either push the flower's own pollen on the stigma, or bring pollen from another flower.
The current research work is designed to find the taxonomic diversity and the use of palynological data for the characterization of the papilionaceous flora of Shishi Koh Valley Chitral.
In the third section, the KBNN is applied to tapered dual-plane EBG and papilionaceous dual-plane EBG which shows the feasibility of the method.
(Fabaceae) consist of a white or light pink papilionaceous corolla with 5 petals: a standard petal (vexillum), two wing petals (alae), and two keel petals (carina) (Figures 1(a) and 1(b)).
vogelii is typically papilionaceous, about 2.5 cm across and purple with white markings or white.
The vascular anatomy of the flower in the Papilionaceous Leguminosae, I.
On the agency of bees in the fertilization of papilionaceous flowers, and on the crossing of kidney beans.
When harvesting pollen from the papilionaceous flowers of the Leguminosae, T.
Tucker (1987) has found pseudoracemes that resemble the pim triads in 5 of about 32 papilionaceous tribes.