Are rye grass and fescue grass in same family of grasses?

Yes, ryegrass and fescue grass belong to the same family of grasses, known as Poaceae. Specifically, ryegrass is part of the genus Lolium, while fescue is part of the genus Festuca. Both are cool-season grasses often used for lawns, pastures, and turf due to their adaptability and growth characteristics.