Winged Sumac

Large cluster of greenish-white flowers. The center leaf stalk has wings between the leaflets.

Wisteria

A climbing vine with 6-12 inch clusters of fragrant, purple, pea-shaped flowers.

Wood Sorrel

Bright yellow flowers in branching clusters of 3-15.

Yellow Star-grass

Clusters of 1-3 star-shaped yellow flowers. The leaves look like blades of grass.