The flower has 5 white to pale yellow petals (sometimes light purple). The lower petal is the largest and has a darker yellow patch.
Leaves: Alternate
Evening Primrose
Cross-shaped flower with pale yellow, heart-shaped petals. The flower opens in the evening and closes during the heat of the day.
False Flowering Spurge
Loose clusters of white, 5 petaled flowers. A green, drooping fruit hangs from the center.
Field Pansy
Solitary flowers with pale to medium blue-violet petals with dark purple lines. Petals are unequal. The lowest petal is the largest and has a yellow patch close to the center of the flower. The two side petals have white hairs near the throat.
Field Pennycress
Tiny, white flowers in clusters. The seeds are flat, papery pods.
Frost Aster
Flowers with 16-35 white petals. The center is yellow to reddish.
Giant Ironweed
Magenta flowers in a large, loose cluster at the end of the stem. Each flower head has 13-30 flowers. The leaves are up to 12 inches long, and are rough-hairy underneath.
Great Blue Lobelia
Deep blue to purple flowers that open to two spreading lips. The upper lip has 2 lobes, the lower lip has 3 wider lobes with broad white stripes at the base.
Hop Clover
Half-inch yellow flower heads with 20-30 tiny, pea-shaped flowers.
Kidneyleaf Rosinweed
Clusters of yellow flowers with 6-12 petals. The kidney-shaped leaves grow up to 14 inches long and are at the base of the plant.