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List of Noxious Weeds in Phillips County
Field bindweed Musk thistle Johnson grass
Field Bindweed
Other common names:

BIOLOGY

  • Life duration/habit: Field bindweed is a creeping or twining perennial herbaceous vine that can grow 0.3 to 2 m (I to 6 ft) long. It often forms dense colonies.
  • Reproduction: This species reproduces by both seeds and rhizomes.
  • Roots: Taproots may extend more than 3 m (9 ft) into the soil. It also has an extensive system of lateral roots.
  • Stems and leaves: The prostrate stems produce leaves that are arrowhead-shaped and normally slender with sharp, pointed lobes; they measure 1.2 to 4.3 cm (0.5 to 1.7 in) long. Leaves are alternately arranged along the stem.
  • Flowers: The funnel- or trumpet-shaped flowers are about 2.5 cm (I in) in diameter and vary from white to pink. Flowers are produced from late June until early fall.
  • Fruits and seeds: Seed pods are pointed and about 5 mm (0.2 in) long. Four rough, dark brown, pear-shaped seeds usually grow in each pod. Seeds remain viable for up to 50 years.
  • INFESTATIONS: Worst infested states: Throughout the temperate United States.
  • Habitat: Field bindweed tolerates a great range of environmental conditions and elevations and is found in all types of ground, including cultivated fields and waste places. It grows best on fertile, dry or moderately moist soils and is extremely difficult to control.
  • Impacts: Field bindweed is a serious weed in most of the United States, especially on farmlands. It generally grows in dense, tangled mats that may reduce crop production by as much as 60%.
  • COMMENTS: Field bindweed is sometimes confused with wild buckwheat. The two species are differentiated by leaf shape: wild buckwheat has a heart-shaped leaf while field bindweed has a spade-shaped leaf.


  • Musk Thistle
    Like Canada thistle, musk thistle also has green, spiny leaves. However, the spines on each leaf are longer and are more apt to cause physical harm to wildlife and humans. Musk thistle characteristics include a large purple flower about half the size of a tennis ball and each leaf has a very prominent midrib. Also, musk thistle thistle is found as a single plant rather than in dense colonies which characterizes Canada thistle. Another way to identify musk thistle is by its tap root, Canada thistle lacks a stout tap root. Musk thistle is typically found in lowlands or disturbed areas

    Johnson Grass
    Invasive Johnson grass is a large grass which can grow to cover extensive areas along ditches and into fields. It also occurs in marginal wetlands. Johnson grass is a large NON-NATIVE grass. stems erect, to 8 ft. tall; leaf blades long, flat, midrib white, to 2 ft. long, to 3/4 in. wide, folded at the base, margins finely rough; ligule thin, papery; inflorescence very large, to 20 in. long, widely spreading, branched, jointed axis; spikelets in pairs at the nodes of the axis, half are on stalks, all are hairy.

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