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Beggarticks, Nodding, Bidens cernua

Weed Control Options Beggarticks, Nodding
Table of Contents
  1. Life Cycle
  2. Propagation
  3. Stems
  4. Leaves
  5. Flowers and Fruit
  6. Habitat
  7. Distinguishing Features
  8. Media Items

 

Life Cycle

Annual

Propagation

Reproducing only by seed.

Stems

Stems erect, branched and 10-100cm high.

Leaves

Opposite (2 per node - Figure 3), compound with 5 leaflets and sharply toothed.

Flowers and Fruit

Flower heads showy, 2.5-5cm across, ray florets bright yellow, up to 1.5cm long, usually 8 per head but occasionally fewer or absent altogether. The disk florets are yellowish-green and densely crowded together. The flower head is surrounded by several, long, leafy, green involucral bracts. The seeds are brownish, flat, long-oval, with 2 downward-barbed awns on top (Figure 5). Flowers from July to late autumn.

Habitat

Nodding beggarticks occurs throughout Ontario in moist places, usually in meadows, river valleys, roadside ditches, and depressions in cultivated land.

Distinguishing Features

It is distinguished by its opposite undivided leaves, its large flower heads with usually 8 yellow ray florets and long, leafy, green involucral bracts, and its seeds with 2 downward-barbed awns.

Media Items

Figure: 1
Figure 1: A: Nodding beggarticks - top of flowering stem (B & C: Tall beggarticks - top of flowering stem and "seed") Top

Figure: 2
Figure 2: Cotlyedon Top

Figure: 3
Figure 3: Seedling Top

Figure: 4
Figure 4: Stem Top

Figure: 5
Figure 5: Leaf Top

Figure: 6
Figure 6: Seeds Top