Nodding Bur-Marigold - Nodding Beggarticks - Black-jack - Cobbler's Pegs
Bidens cernua
Asteraceae (Composite Sunflower) Family

Plant is a native annual plant that grows to 3 feet tall, branching sparingly, and may also be known as Goldenglow. The central stem is smooth and occasionally angular. Its preferred habitat is full or partial sun, wet conditions, and mucky soil. Occasional flooding is tolerated, although this species is not an emergent aquatic. Distribution in the Escambia region is occasional.

The leaves are opposite on the stem and measure upwards to 5 inches long and about 1 inch across, although usually smaller in size. The form is linear-oblong to lance-like or ovate with serrations along the margins. Each leaf may clasp the stem and nearly surround it or it may be sessile (no leaf stalk).

The flowers are heads that have a tendency to nod downward with age and the central head of disk florets becomes larger and more rounded. Each disk floret is yellow with 5 tiny lobes. There are about 8 petals surrounding the disk florets, but sometimes the flowerheads are without rays. At the base of each flowerhead, there are both inner and outer bracts. The inner bracts are pale yellow, membranous along the margins, and rather broad, tapering to blunt tips. The outer bracts are green and oblong-linear. Flowers occur in late summer to early autumn.

Fruit is achene.

The plant often forms colonies and spreads by reseeding itself; sometimes the lower portion of a stem will form rootlets at the leaf nodes when it resting against moist soil. Nodding Bur-Marigold is rather variable across its range.

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