pulvinus

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pul·vi·nus

 (pŭl-vī′nəs, -vē′-)
n. pl. pul·vi·ni (-nī′)
A cushionlike swelling at the base of the stalk of a leaf or leaflet.

[Latin pulvīnus, cushion.]
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.

pulvinus

(pʌlˈvaɪnəs)
n, pl -ni (-naɪ)
(Botany) a swelling at the base of a leafstalk: changes in its turgor pressure cause changes in the position of the leaf
[C19: from Latin: cushion]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

pul•vi•nus

(pʌlˈvaɪ nəs)

n., pl. -ni (-nī).
a cushionlike swelling at the base of a leaf or leaflet, at the point of junction with the stem.
[1855–60; < Latin pulvīnus cushion]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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Uncus bifurcated at base, 1/2 times as long as tegument, each fork medium-long, slender at apex, broad at base; tegumen wide and arc-shaped, socii broad and wide, incurved at apex and strongly setose, shorter than uncus; gnathos degenerated; 1 pulvinus between tegument and valva, finger-shaped protuberance at pulvini; valva clavate, wide and thick at base; cucullus thin and long, strongly sclerotized; juxta similar triangle-shaped; saccus medium-long and thin.
However, other studies of intact pulvini have shown that a given stimulus produces opposing activity between the two regions, as is expected from the visible bending response.
Their diet is based on leaves and fruits, although other vegetable matter, such as petioles, pulvini, buds, flowers, stems, twigs and bark can also be eaten," said Dr Julio Bicca-Marques of the Primatology Research Group at the PUC/RS Bioscience Faculty in Porto Alegre, Brazil.
The first two of the nine contributions in this collection synthesize recent findings leading to new models explaining how plants sense gravity and organize gravity signal transduction in roots, hypocotyls, shoots, and cereal pulvini. The last two chapters survey microgravity experiments conducted during spaceflight and envision the potential of plants to sustain a human presence in space.
The text, inscribed on the surface of a table in its second use, lists a variety of furniture and furnishings: lecticubiculares, lecti tricliniares, culcitae, pulvini, subsellia, cathedrae, emitulia, and grabati.