a grass, Bromus unioloides (or B. catharticus), of tropical America, having clusters of flattened spikelets, grown for forage.
Origin of rescue grass
1880–85, Americanism; rescue, perhaps alteration of fescue
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for rescue grass
Rescue-grass, res′kū-gras, n. a species of brome-grass, native to South America.