Annual Sow-Thistle Sonchus oleraceus L. Annual plant up to 1.0 m tall reproducing only from seed and with a deep taproot. Leaves are deeply lobed, without hairs, and shiny. Lower leaves have long petioles; upper ones are without petioles and the lower lobe clasps the...

Canadian St. John's-Wort Hyperictm canadense L. A small, slender erect plant 10 to 40 cm tall with narrow, linear leaves that have 3 veins . Flowers have 5 bright yellow petals . The fruit is a small reddish capsule (<0.5 cm) containing numerous, tiny black seeds.

Canadian St. John's-Wort Hyperictm canadense L. A small, slender erect plant 10 to 40 cm tall with narrow, linear leaves that have 3 veins . Flowers have 5 bright yellow petals . The fruit is a small reddish capsule (<0.5 cm) containing numerous, tiny black seeds.

Canadian St. John's-Wort Hyperictm canadense L. A small, slender erect plant 10 to 40 cm tall with narrow, linear leaves that have 3 veins . Flowers have 5 bright yellow petals . The fruit is a small reddish capsule (<0.5 cm) containing numerous, tiny black seeds.

Black Medick Medicago lupulina L. A low-growing, prostrate annual legume with hairy stems up to 0.5 m long. Leaves are clover-like with 3 hairy leaflets . The middle leaflet has the longest stalk. The flowering head is a globe-shaped cluster of small, yellow pea-like...

Black Medick Medicago lupulina L. A low-growing, prostrate annual legume with hairy stems up to 0.5 m long. Leaves are clover-like with 3 hairy leaflets . The middle leaflet has the longest stalk. The flowering head is a globe-shaped cluster of small, yellow pea-like...

Black Medick Medicago lupulina L. A low-growing, prostrate annual legume with hairy stems up to 0.5 m long. Leaves are clover-like with 3 hairy leaflets . The middle leaflet has the longest stalk. The flowering head is a globe-shaped cluster of small, yellow pea-like...

Black Medick Medicago lupulina L. A low-growing, prostrate annual legume with hairy stems up to 0.5 m long. Leaves are clover-like with 3 hairy leaflets . The middle leaflet has the longest stalk. The flowering head is a globe-shaped cluster of small, yellow pea-like...

Black Medick Medicago lupulina L. A low-growing, prostrate annual legume with hairy stems up to 0.5 m long (Fig. 1). Leaves are clover-like with 3 hairy leaflets . The middle leaflet has the longest stalk. The flowering head is a globe-shaped cluster of small, yellow...

Large Hop Clover Trifolium campestre Schreber A small, much-branched annual legume less than 40 cm tall. It resembles black medic (Medicago lupulina L.) but this species is smaller, with smooth stems, and the stipules at the base of the petiole are longer, about one...

Large Hop Clover Trifolium campestre Schreber A small, much-branched annual legume less than 40 cm tall. It resembles black medic (Medicago lupulina L.) but this species is smaller, with smooth stems, and the stipules at the base of the petiole are longer, about one...

Large Hop Clover Trifolium campestre Schreber A small, much-branched annual legume less than 40 cm tall. It resembles black medic (Medicago lupulina L.) but this species is smaller, with smooth stems, and the stipules at the base of the petiole are longer, about one...

Large Hop Clover Trifolium campestre Schreber A small, much-branched annual legume less than 40 cm tall. It resembles black medic (Medicago lupulina L.) but this species is smaller, with smooth stems, and the stipules at the base of the petiole are longer, about one...