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A woody plant (Spiraea tomentosa) in the rose family, native to eastern North America, having leaves with rusty down on the undersides and spikelike clusters of small rose-purple flowers. Also called steeplebush.
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 woody North American rosaceous plant, Spiraea tomentosa, with downy leaves and tapering clusters of small pink or white flowers. Also called: steeplebush
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014



a woolly-leaved North American shrub, Spiraea tomentosa, of the rose family, having short, spikelike clusters of rose-colored flowers. Also called steeplebush.
[1805–15, Amer.]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
In areas where the wind had s-s-s-swirled much of the snow to spotty drifts, the t-t-twisted, fragile stems of June grass and the upright heathery hardhack wrote s-strange hieroglyphics against the whitened p-page."
Common woody species encountered were Spiraea tomentosa (hardhack), Rubus hispidus (swampy dewberry), and Aronia melanocarpa (black chokeberry).
"All my childhood is in those bayberry-bushes, & queen-of-the-meadow, or maybe you call it hardhack, & rose-hips.