a European grass, Sieglingia decumbens, growing in spongy, wet, cold soils.
Also called heather grass.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for heath grass
a perennial European grass, Danthonia decumbens, with flat hairless leaves
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