[Members of the Sunflower Family Having Daisy-like Flower Heads Found West of the Cascade Mountains of Oregon and Washington]

Bur Marigolds and Beggarticks West of the Cascade Mountains of Oregon and Washington

The Genus Bidens

Nodding Beggarticks, Bur Marigold: Bidens cernua (Synonyms: Bidens cernua var. cernua, Bidens cernua var. elliptica, Bidens cernua var. minima)

Nodding beggarticks as seen along the Columbia River shoreline between Multnomah Falls and Dalton Point.......September 26, 2015.

Vancouver Island Beggar-ticks: Bidens amplissima (Synonyms: Bidens cernua var. elata, Bidens elata) - Flower heads with ray flowers. Leaves tripartite or 3-lobed.

Beck's Water Marigold, Water-marigold, Water Marigold: Bidens beckii (Synonyms: Megalodonta beckii, Megalodonta beckii var. beckii, Megalodonta beckii var. hendersonii, Megalodonta beckii var. oregonensis) - Plants submerged. Leaves filiform-dissected.

Bur Marigold, Nodding Beggarticks, Nodding Beggar-ticks, Nodding Beggars-ticks, Nodding Beggar Ticks: Bidens cernua (Synonyms: Bidens cernua var. cernua, Bidens cernua var. elliptica, Bidens cernua var. minima) - Flower heads with ray flowers. Leaves simple.

Beggarticks with flower heads lacking ray flowers.

Paul Slichter E-mail