Dictionary.com
definitions

stonecrop

[stohn-krop]
noun
  1. any plant of the genus Sedum, especially a mosslike herb, S. acre, having small, fleshy leaves and yellow flowers, frequently growing on rocks and walls.
  2. any of various related plants.

Origin of stonecrop

before 1000; Middle English stooncrop, Old English stāncrop. See stone, crop
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for stonecrop

stonecrop

noun
  1. any of various N temperate crassulaceous plants of the genus Sedum, having fleshy leaves and typically red, yellow, or white flowers
  2. any of various similar or related plants

Word Origin for stonecrop

Old English: so named because it grows on rocks and walls
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