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Appearance: Fast-growing vine, purple flowers, large trifoliate leaves, areas where it's prevalent: Southeastern US, along roadsides and disturbed areas, management strategies: Repeated mowing, grazing, herbicides

Appearance: Spiny, deeply lobed leaves, purple flower heads, areas where it's prevalent: Pastures, meadows, roadsides, common in US and Europe, management strategies: Mowing before seed set, herbicides, foster competitive forages

Appearance: Trifoliate (three-leaf) arrangement, white berries, areas where it's prevalent: Woodlands, along edges, widespread in North America, management strategies: Careful removal while protected, herbicides, goats for grazing

Appearance: Bright yellow flowers with rosettes of leaves, areas where it's prevalent: Lawns, meadows, gardens, and disturbed soils across North America and Europe, management strategies: Manual removal with root, herbicides, promoting healthy turf

Appearance: Mat-forming herb, small white flowers, common in lawns and gardens, areas where it's prevalent: Widespread in temperate regions, management strategies: Hand pulling, mulching, post-emergent herbicides

Appearance: Fine fern-like leaves, small greenish flowers, areas where it's prevalent: Throughout the US, especially in disturbed soils, fields, and roadsides, management strategies: Mowing before flowering, selective herbicides, establish dense turf or vegetation

Appearance: Evergreen climbing vine, lobed and glossy leaves, areas where it's prevalent: Woodlands, walls, building sides, invasive especially in the Pacific Northwest and Southeastern US, management strategies: Manual removal, cutting followed by herbicide, smothering with mulch or plastic

Appearance: Fleshy succulent leaves, small yellow flowers, areas where it's prevalent: Gardens, fields, disturbed areas, widespread especially in warmer climates, management strategies: Hand pulling, ensuring complete removal of root pieces, organic and chemical herbicides

Appearance: Clump-forming, spreading grass, areas where it's prevalent: Lawns, garden beds, sidewalks, widespread across the US, management strategies: Pre-emergent herbicides, maintain thick lawn, manual removal

Appearance: Huge umbrella-shaped flower clusters, towering stems, large incised leaves, areas where it's prevalent: Along streams, vacant lots in the Northeastern US and parts of Canada and Europe, management strategies: Wear protective clothing, cutting followed by herbicide application, vigilant monitoring for regrowth

Appearance: Spiny, lobed leaves, purple or pink flowering heads, areas where it's prevalent: Pastures, croplands, roadsides, North America, and Europe, management strategies: Persistent mowing, herbicides, promote competitive crops

Appearance: Upright plant, small greenish flowers, toothed leaves, areas where it's prevalent: Farms, gardens, disturbed soils globally, management strategies: Hand-weeding, mulches, herbicides

Appearance: Trailing or climbing vines, trumpet-shaped white or pink flowers, areas where it's prevalent: Farms, gardens, and along roadsides, widespread in US, management strategies: Continuous cultivation, deep removal of roots, herbicides

Appearance: Hollow bamboo-like stems, broad leaves, small white flowers, areas where it's prevalent: Riparian areas, roadsides, wastelands in North America and Europe, management strategies: Cutting followed by herbicides, root barrier techniques, biological control