Agalinis purpurea is 10 to 120 centimeters tall.
The stem is slender, with spreading branches.
It has simple opposite leaves, which are 10 to 40 millimeters long, and only 0.5 to 2 millimeters wide.
The flowers are racemose on the branches.
They are borne on 1 to 8 millimeter long pedicles.
Each flower is bilaterally symmetrical, with five 20 to 38 millimeter long petals fused into a corolla tube, and four stamens.
The fruit is a round 4 to 6 millimeter long dry capsule that splits open when ripe.
Agalinis purpurea is 10 to 120 centimeters tall. The stem is slender, with spreading branches. It has simple opposite leaves, which are 10 to 40 millimeters long, and only 0.5 to 2 millimeters wide. The flowers are racemose on the branches. They are borne on 1 to 8 millimeter long pedicles. Each flower is bilaterally symmetrical, with five 20 to 38 millimeter long petals fused into a corolla tube, and four stamens. The fruit is a round 4 to 6 millimeter long dry capsule that splits open when ripe.
Agalinis purpurea