Feathertop grass is a beautiful ornamental grass that adds a graceful touch to any garden or landscape. It is also known by several other names, including needlegrass, feather reed grass, Calamagrostis, and Korean feather reed grass. Feather reed grass, also known as Calamagrostis acutiflora, has fine-textured feathery plumes that sway gracefully in the breeze. Needlegrass, also known as Stipa pennata, has delicate plumes that resemble feathers and can grow up to 3 feet tall. Korean feather reed grass, or Calamagrostis brachytricha, has fluffy, feathery flower heads that bloom in late summer to fall. Regardless of the name, feathertop grass is a stunning addition to any landscape.