Manna grass Meaning, Definition & Usage

  1. noun any of several moisture-loving grasses of the genus Glyceria having sweet flavor or odor
    sweet grass.

WordNet

Definitions
  1. (Bot.), a name of several tall slender grasses of the genus Glyceria. they have long loose panicles, and grow in moist places. Nerved manna grass is Glyceria nervata, and Floating manna grass is G. flu.

Webster 1913