Dictionary.com
Thesaurus.com

stone bramble

British  

noun

  1. a herbaceous Eurasian rosaceous plant, Rubus saxatilis, of stony places, having white flowers and berry-like scarlet fruits (drupelets) See also bramble

"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

Etymology

Origin of stone bramble

C18: so called because it grows in stony places