ClipArt ETC
Various views of the cocklebur, Xanthium canadense.

Cocklebur

Various views of the cocklebur, Xanthium canadense.

A plant with a hollow stock and a yellow flower on top.

Dandelion

A plant with a hollow stock and a yellow flower on top.

Flowers and shrubbery

Flowers

Flowers and shrubbery

Various views of the galinsoga, Galinsoga parviflora.

Galinsoga

Various views of the galinsoga, Galinsoga parviflora.

A pond weed.

Pond Weed

A pond weed.

Various views of the tall ragweed, Ambrosia trifida.

Ragweed

Various views of the tall ragweed, Ambrosia trifida.

Various views of the false ragweed, Iva xanthifolia.

False Ragweed

Various views of the false ragweed, Iva xanthifolia.

Various views of the fine-leafed sneezeweed, Helenium tenuifolium.

Sneezeweed

Various views of the fine-leafed sneezeweed, Helenium tenuifolium.

"A plant of the genus <i>Sonchus</i>, primarily <i>S. oleraceus</i>, a weed of waste places, probably native in Europe and central Asia, but now diffused nearly all over the world. It is a smooth herb with a milky juice, bearing runcinate-pinnatifid leaves and rather small yellow flower heads... 1. upper part of the stem with the heads; 2. one of the basal leaves; a, a flower; b, the achene with the pappus." &mdash;Whitney, 1889

Sow Thistle - Stem with Heads, Basal Leaves, Flower, Achene with Pappus

"A plant of the genus Sonchus, primarily S. oleraceus, a weed of waste places, probably native in Europe…

A moss-like water weed.

Water Weed

A moss-like water weed.

Also known as Antirrhinum orontium. It is a weed with pink flowers and hairy green fruit.

Weasel's Snout

Also known as Antirrhinum orontium. It is a weed with pink flowers and hairy green fruit.

A weeder used for harrowing small grains.

Weeder

A weeder used for harrowing small grains.

A weeder.

Weeder

A weeder.