ˌkaləməˈgrästə̇s noun
Usage: capitalized
Etymology: New Latin, from calam- + Latin agrostis couch grass, from Greek agrōstis dog's-tooth grass, perhaps from agros field — more at acre
: a genus of tall mostly perennial grasses having single-flowered spikelets, the lemmas entire, and the rachillae usually extending beyond the palea into a hairy bristle or stalk — see bluejoint 1