Orchard Grass is a perennial cool season grass with flat leaf blades. (petco.com)
It attacks different parts of the plant: the collar, which can ultimately kill the entire leaf blade; the stem, which turns blackish and breaks easily (node blast); the neck of the panicle, where the infected part is girdled by a grayish brown lesion, or when severe, causes the panicles to fall over; or on the branches of the panicles which exhibit brown lesions when infected. (irri.org)
They can grow up to four feet (1.2 m) tall and are formed from a series of leaf bases wrapped tightly around each other with long and narrow mid-green leaf blades arranged alternately. (herbazest.com)