Field Sow-Thistle
Sonchus arvenis
Family: Composite or Dasiy (Compositae or Asteraceae)

Petal arrangement: Field Sow-Thistle have dandelion-like flowers. They have glandular hairs on the bracts and stalks. The inflorecence is about 1 to 2 inches or 3 to 5 cm wide.

Color: Yellow

Leaf arrangement: The leaves are very prickly around the edges. The leaves are divided or toothed. They grow alternately at the base, and somewhat up the stem.

Size, Location, Season: The Field Sow-Thistle grows to be about 1 to 8 feet or 14 to 210 cm tall. It grows along waste places, fields, and roadsides. It grows from Ontario south to Mississippi, and west to Newfoundland and south to Missouri. It grows from July to October.

**Found at Brandeis University behind the Kosow Biochemistry Building in the beginning of October.
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