[Cal-IPC] Invasive: Agrostis stolonifera (creeping bentgrass) is a perennial grass (family Poaceae) and is located throughout California. Creeping bentgrass is an escaped turfgrass that can aggressively out-compete native grass species by forming dense mats. Cal-IPC Rating: Limited (link added by Mary Ann Machi)

[Wikipedia] Native to Eurasia, North Africa, possibly North America: t can be found growing in a variety of habitats including woodlands, grasslands and meadows, wetlands, riparian zones, and as a pioneer species on disturbed sites.[4] It is native to Eurasia and North Africa (Algeria, Morocco and Tunisia). It is possible that it may also be native to northern parts of North America, and in any case it has been widely introduced and naturalised on that continent and in many other places (link added by Mary Ann Machi)