Weed With Long Seed Pods

information about bindweed Learn how kudzu took hold in the U.S. and how to identify and control an outbreak if it invades your landscape. – Preen Jimsonweed, Datura stramonium Stems stout, erect, 90-200cm high, usually much-branched in the upper part, smooth and hairless. Larger plants will have a main stem often 5cm or more in diameter.


Field Bindweed · Convolvulus arvensis L. · is a perennial broad-leaved plant that spreads over the soil and other structures, and often form mats. Leaves alternate along the stem. Leaf size and shape will be varied; typically leaves are up to two inches long and egg-shaped. Flowers are typically white, but often they are light pink and have two leaf-like structures half-way between the main stem and the base of the flower, which is a distinct characteristic.The flowering stage is when most field bindweed is noticed.

The root system is what makes the weed so hard to control. Roots can extend to as far as 30 feet deep. These roots compete with crops for moisture and nutrients, and give field bindweed an advantage over the newly seeded crops by already being in the soil.

Seed pods are egg-shaped, 1/4″ in diameter, and contain two to four seeds. Seeds are shaped like a slice out of an orange, small (only 1/8″ long), and covered by rough raised dots. Though small, these seeds can lay dormant for as long as 30 years.
Specific Control

Field Bindweed is a noxious weed that can be a severe problem in the largest field or the smallest garden. A summer herbicide treatment will control existing growth and eliminate seed production. For lasting control, a three-phase treatment plan should begin at first blooming and continue through fall:
Phase I Treat Field Bindweed with an approved herbicide or control measure shortly after flowering blooms appear. Phase II Retreat new bindweed growth approximately 30 to 45 days after the initial treatment or when 12″ – 18″ runners exist. Phase III Retreat returned bindweed growth with an approved systemic herbicide after the first frost in the fall, but before nighttime temperatures reach 20°F. Chemical Controls

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Weed With Long Seed Pods

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The “Weed that Ate the South” Is Heading North

Kudzu can be identified by its lobed leaves that grow in three-leaf clusters. When flowering, it produces reddish-purple flower spikes which mature into flat, brown, 2-inch-long seed pods. iStock / Getty Images Plus

Kudzu – that vining weed that earned the nickname the “vine that ate the South” for its vigorous spread in warm-weather states – is expanding into new areas. Warming temperatures and the weed’s prolific ability to spread has increased kudzu’s range to Ohio, Pennsylvania, Michigan, and New York, including as far north as the Canadian shore of Lake Erie. It’s also spread westward from Mississippi and Alabama into Texas.

Few plants have the incredible growth power of kudzu (Pueraria). Under ideal growing conditions, it can grow nearly a foot a day and 60 to 100 feet in a season. The plant sends down large tap roots, its crowns can send up as many as 30 vining shoots, and its leaves have the ability to mine growth-enhancing nitrogen directly from the air. Kudzu spreads by seed but mainly by rooting where its stems touch the ground.

Kudzu is an invasive vine that grows fast and covers everything, eventually killing many native species. iStock / Getty Images Plus

Kudzu first came to the United States from eastern Asia as a promising specimen at the U.S. Centennial Exposition in Philadelphia in 1876. It was introduced in the South seven years later at the New Orleans Exposition. The plant quickly caught on for several of its redeeming qualities. Cattle farmers used the high-protein, fast-growing leaves and stems as livestock feed. The Civilian Conservation Corps and others planted it widely in the first half of the 20 th century for erosion control. And southern-states home gardeners bought kudzu as an ornamental vine that quickly shaded porches. Besides the dense habit of the green foliage, kudzu produces attractive arching spikes of purple flowers in late summer.

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By the 1950s, ecologists realized that kudzu was doing too well for its own good. It was choking out native vegetation, overspreading and killing even tall trees, and pulling down power lines. The U.S. Department of Agriculture reclassified kudzu as a weed in 1970, and efforts since have been to slow or eliminate it instead of plant it.

Kudzu can be identified by its lobed leaves that grow in three-leaf clusters and have tiny hairs on their undersides. The reddish-purple flower spikes mature into flat, brown, 2-inch-long seed pods.

An outbreak of kudzu is best stopped by digging out all rooted pieces when the plant is young. Repeated cutting or mowing to the ground also can weaken an existing stand of it. Several spray herbicides are effective at killing kudzu, although repeated applications over several years might be needed to get rid of it completely.

Jimsonweed, Datura stramonium

Stems stout, erect, 90-200cm high, usually much-branched in the upper part, smooth and hairless. Larger plants will have a main stem often 5cm or more in diameter.


Cotyledons (seed leaves) are narrow and about 2-4cm long, shriveling but persisting on the developing seedling. The first true leaves are ovate with pointed tips and few or no lobes. Later leaves distinctly alternate (1 per node), usually somewhat coarsely and sharply toothed or lobed, 10-20cm long and long-stalked.

Flowers and Fruit

Flowers and seedpods short-stalked, borne singly in the angles between 2 or more stems and a leaf. The calyx is tubular or urn-shaped. The corolla is white or light purple, very long, tubular or trumpet-shaped, 7-10cm long with the flared end having 5 points. The seedpod is at first green and fleshy with sharp, soft spines, becoming a large (2-5cm across), dry, hard seedpod covered with very sharp, harsh spines and containing numerous black, flat, round seeds. Flowers from July to autumn.

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Jimsonweed occurs in the warmer parts of southern Ontario in cultivated fields and around farmyards.

Distinguishing Features

It is distinguished by its tall, stout, branched stem (like small trees), large leaves, large, white or purplish trumpet-shaped flowers, large spiny seedpod and sour repulsive odour.


All parts of the plant are poisonous.

Human Health Issues

All parts of the jimsonweed plant are poisonous and are fatal if consumed in high quantities. Its toxicity is caused by tropane alkaloids.

Jimsonweed. A. Top of flowering plant. B. Seedling. C. Fruit.

linear cotyledons of Jimsonweed

A young seedling plant.

Large seedling plant prior to flowering.

The poisonous seeds of Jimsonweed

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