Calamagrostis x acutiflora 'Karl Foerster' is known as?

Calamagrostis x acutiflora 'Karl Foerster' is commonly known as Feather Reed Grass. This ornamental grass is valued for its tall, upright growth habit, which offers both visual interest and structural form in landscape designs. It typically produces feathery flower plumes that sway gracefully in the wind, hence the name “Feather Reed Grass.” Additionally, it is known for its drought tolerance and ability to thrive in various soil conditions, making it a popular choice among gardeners and landscape designers.

While stonecrop refers to a group of succulents, black-eyed Susan is a flowering perennial known for its bright yellow petals and dark centers, and perennial sage is a herbaceous plant characterized by its aromatic leaves, none of these terms accurately describe Calamagrostis x acutiflora 'Karl Foerster.' Each of those other options belongs to a different category of plants, underscoring why Feather Reed Grass is the correct identification in this case.