Briza
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Briza is a genus of annual and perennial plants in the grass family, native to northern temperate regions of Eurasia, North Africa, and certain islands in the Atlantic.
Poa
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Poa is a genus of about 570 species of grasses, native to the temperate regions of both hemispheres. Common names include meadow-grass, bluegrass, tussock, and speargrass. Poa is Greek for 'fodder'. P
"Bluegrass": The seed pods go from green to purplish blue to brown. During the purplish blue phase the seed stems have a navy-blue coating.
Poa trivialis (rough meadow-grass), showing the ligule structure