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  • Anatomy of a medusahead invasion

    Anatomy of a medusahead invasion

    Medusahead, an invasive grass, is set to take over the West.

  • As seas rise, cities retreat

    As seas rise, cities retreat

    Climate change is threatening West Coast cities.

  • Becoming a native

    In a West made up of newcomers, it’s hard to tell who really counts as a native – even when it comes to exotic plants such as the infamous tamarisk.

  • Bonfire of the Superweeds

    In Arizona’s Sonoran Desert, good intentions are responsible for the introduction of exotic buffelgrass – but all the good intentions in the world may not be enough to save the desert now that this invasive and fire-prone plant is spreading

  • Fire: Friend and foe

    Recent Western fires have cleared the stage for the rampant growth of highly flammable exotic plants such as cheatgrass and the buffelgrass now invading the Sonoran Desert

  • It may be High Noon for tumbleweed

    It may be High Noon for tumbleweed

    The tumbleweed may seem like a Western icon, but actually it's an invasive nuisance that scientists are struggling to control.

  • It’s ‘bombs away’ on New Mexico saltcedar

    The state of New Mexico is beginning an aerial herbicide assault on the exotic shrub saltcedar, or tamarisk, but some fear spraying Arsenal along the Rio Grande could harm native cottonwoods

  • The Weed-wackers

    Botanist Sue Rutman has had surprising success just yanking up buffelgrass, but herbicides remain the first line of defense

  • Today's garden plants can be tomorrow's invasives

    Today's garden plants can be tomorrow's invasives

    Some popular ornamental garden plants have become invasive, particularly in California.

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