Perennial; horizontal or vertical stems with bur-like seed heads. Typically clustered together.

Angled or square, green, erect stems with short stiff hairs along stems. Leaves are opposite with coarse toothed margins. Originally short terminal purple flower clusters that become elongated.

Stems are branching, woolly and covered in spines. Leaves are lobed with prickles, and cottony hairs underneath. Flowers are pink to purple with spine-tipped bracts.

Flowers are clusters of small purple heads. Leaves have wavy margins with prickles along the edges. Not as hairy as bull thistle.

Perennial; multiple green to brown stems grow from one root crown. Flowering stems are covered with wooly hairs. Yellow flowers on stems without leaves; leaves occur after flowers mature. Leaves are long heart-shaped, 2-8” long. Found in colonies.

Perennial; spiny, rigid, green stems. Opposite, oblong, prickly leaves. Small white flowers on oval shaped cone.

Herbaceous perennial with waxy stems and leaves; stems branch in upper portion of plant. Bright yellow flowers with orange markings and long spurs.

Annual plants that parasitize the leaves and stems of other plants. Dodders have leafless, threadlike stems that are orange, red or yellow. Roots disappear after stems have attached to host plant. Small, whitish, bell-shaped flowers appear summer through fall.

Long bluish-green alternating leaves, can be up to 8” long, with prominent whitish mid-veins. Flower stems grow up from basal leaves; small bright yellow flowers at the top of stems. Teardrop fruits, purplish to brown in color.

Bright green fern-like leaves with bristles on leaves and stalks. Bright blue flowers with white center arranged in numerous small, umbrella-shaped clusters.

Biennial; alternate, triangular to heart shaped coarsely toothed leaves. Small white, 4 petal flowers.

Biennial or perennial; stems are hollow, dark reddish-purple in color, and covered in sturdy bristles. Flowers in its final year (2-5 years), many white flowers clustered in an umbrella-shape. Large (up to 5’ wide), lobed leaves with toothed margins.

Perennial; mature leaves are alternate pinnate on many stalks making the plant look bush-like. White and blueish to purplish pea-like flowers. Seeds are in green, smooth, narrow pods.