Bright yellow flowers in branching flat-topped clusters with 20 or more individual flowers.
Petals: Many
Starry Rosinweed
Large, yellow, daisy-like flowers with 8-20 petals and a yellow center. The leaves can be alternate or opposite.
Swamp Sunflower
Flowers have 8-21 yellow petals with a reddish or purplish-brown center disk.
Water Lily
Cup shaped flower with >20 petals and yellow stamens. Flowers open in the day and close at night.