Johnsongrass

Canadian Thistle

Bull Thistle

Plumeless Thistle

Musk Thistle

Shattercane

Multiflora Rose

Perennial, reproducing by large creeping rhizomes and seeds. Stems erect, stout, from 1 1/2 to 7 feet tall or more. Usually froms dense stands. Leaves alternate, simple, smooth, 6 to 20 inches long, and 1/2 to 1 1/2 inches wide. Seed head with broad, open panicle. Seed generally turns reddish-brown or darker when mature.

Perennial up to five feet tall, reproduction primarily by extensive creeping rhizomes but also by seed. Stems erect, grooved, with branching near top of plant. Leaves oblong, lance shaped, often with spiny margins. Flowers compact, numerous, and small, 3/4 inch in diameter - light lavender to rose color. Male and femaile flowers produced on separate plants. Blooms late May to late June with flowering recurring later in season through September.

Biennial, reproducting by seeds. Taproot fleshy. Rosette leaves are woolly and grayish. Stem is branched and hairy, two to five feet tall or more. Leaves extend down the stem in spiny wings. Leaves deeply cut or lobed with sharp, long, apical spines. Upper leaf surface has short stiff hairs. Mature plant typically resembles a Christmas tree form. Flower heads are compact, 1 to 1 1/2 inches in diameter, rose to purple in color. Blooms from July to September.

Biennial (sometimes annual) up to six feet tall, reproducing by seed only. Very similar to musk thistle except underside of leaf has compact hairs, and leaves more narrow and deeply serrated. Flowers globe shaped, erect, single or clustered, with spiny wings to base. Flowers much smaller than musk thistle, 1/2 to 1 inch in diameter, reddish purple. Blooms from May to July.

Biennial (sometimes annual) up to eight feet tall, reproducing by seed only. Taproot large, fleshy, and hollow near soil surface. Stems tall, erect, and spiny, with spiny wings, lower portion branched. Leaves alternate, coarsely toothed, with prominent yellow spines. Flowers are large (as much as 2 in. across) on ends of long, nearly-neaked stems, frequently drooping or nodding, purple to lavender. Bloom is in May or June, followed by seed production.

Warm season annual, reproducing by seed. Root system fibrous. Stems erect, smooth, 4 to 8 feet tall with tillers readily produced from crown. Leaves resemble those of forage sorghum with a pronounced whitish-green mid-vein. Seed heads resemble forage sorghum but seeds appear dark red to black when mature. seeds "shatter", or drop easily.

Perennial shrub with arching stems (canes), and leaves divided into five to eleven sharply toothed leaflets. The base of each leaf stalk bears a pair of fringed bracts. Beginning in May or June, clusters of showy, fragrant, white to pink flowers appear, each about an inch across. Small bright red fruits, or rose hips, develop during the summer, becoming leathery, and remain on the plant through the winter.