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crack willow

British  

noun

  1. a species of commonly grown willow, Salix fragilis, with branches that snap easily

  2. any of various related willows

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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The white willow, Salix alba, L., and the crack willow, Salix fragilis L., with bright yellow twigs, are European species which are often planted for ornamental purposes.

From Project Gutenberg