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Subject: False brome invading new areas in Oregon (USA)
Date posted: April 11, 2002
Source: The Nature Conservancy
Brachypodium sylvaticum (false-brome), a perennial bunchgrass native to North Africa and Eurasia, has been reported as rapidly expanding into new habitats in western Oregon, USA. This grass escaped ornamental cultivation near Eugene, OR in 1939, and had, by 1966, established two large colonies near Corvallis (approximately 40 miles to the north). False-brome is now actively spreading throughout a wide range of habitats, including closed-canopy coniferous forest, riparian forest, forest edge, and upland prairie. It is not known how B. sylvaticum will impact native species or communities in the long-run, though it is capable of forming monospecific stands in the understory of forests it invades. While B. sylvaticum has only been reported from Oregon, it has the potential to spread throughout low elevation forests in the Pacific Northwest (British Columbia, Idaho, Oregon, Washington) as well as northern California. It should be noted that this species is not federally regulated by the US.

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