

How to identify Smooth beggarticks (Bidens laevis)
Smooth beggarticks, also known as Bur marigold
Smooth beggarticks is an annual plant reaching heights of up to 6 feet (183 cm). Integral for identification, its showy, bright yellow blooms feature a contrasting brown center and persist until the first frost. Typically, smooth beggarticks adopts a sprawling form, often drooping under the weight of both its flowers and seeds. The environment conducive to its growth are moist areas along water bodies. Its foliage supports the lush inflorescences which are characteristic of the plant's familial lineage.
Bright yellow blooms with brown centers.
Sprawling form with drooping flowers and seeds.
Lance-shaped leaves, serrated margins, 2-6 inches (5-15 cm) long.
Reddish multi-branched stem, smooth texture, 0.2-0.4 inches (5-10 mm) diameter.
Golden yellow flowers, 1.5-2 inches (4-5 cm) diameter, brown central disc flowers.
The leaves of smooth beggarticks are lance-shaped and sessile, meaning they lack a petiole and attach directly to the stem. The base of the leaves is cuneate, sometimes wrapping around the stem, and the margins are serrated. They terminate in acute to acuminate tips. Leaf length ranges from 2 to 6 inches (5 to 15 cm). The leaves exhibit a vein pattern typical to their shape, which assists in their identification.
Smooth beggarticks has golden yellow, cosmos-like flowers that feature around 8 petals. The central disc flowers are brownish. Each bloom measures approximately 1.5-2 inches (4-5 cm) in diameter. These flowers are visually striking and predominantly known for their vibrant coloration and sturdy arrangement. They bloom from June to October, offering an extended period of visual appeal. The scent of the flowers is subtle, making them a pleasant addition to gardens without overwhelming fragrances.
The stem of smooth beggarticks is characterized by its reddish hue and distinct multi-branched pattern. It has a smooth texture without noticeable ridges or hair. Typically, the stem is moderately thick, averaging around 0.2-0.4 inches (5-10 mm) in diameter. The branching of the stem occurs frequently, with secondary stems emerging at various angles, making it bushy in appearance. This characteristic reddish, multi-branched stem is a key identification feature of smooth beggarticks.
The fruit of smooth beggarticks is a distinctive 3-4 angled, wedge-shaped achene typically measuring up to 0.4 inches (1 cm) long. Its surface is adorned with small barbs that are specially adapted to catch onto the fur of animals and the clothing of humans, facilitating seed dispersal. The rigid texture and tawny color of the achene are notable features. The barbs, while minute, are a crucial characteristic aiding in the fruit's identification and distribution.
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Scientific Classification of Smooth beggarticks