Woolly Blue Curls
Woolly Yarrow
Wright Buckwheat
Wulfen Euphorbia
Yankee Point California Lilac
Yellow Bahia
Yellow Bird Of Paradise
Yellow bulbine
Yellow Bush Lantana
Yellow Cosmos
Yellow Cotton
Yellow Dead Nettle
Yellow Eyed Grass
Yellow Lady Banks' Rose
Yellow Moraea, Fortnight Lily
Yellow Stalked Bulbine
Yellow Star Jasmine
Yellow Wave Flax
Yew Pine
Zebra Iris, Orris Perfume Iris