Wintercreeper
Wisley Pink Sunrose
Wisteria
Wisteria, Cooke's Special
Woolly Blue Curls
Woolly Yarrow
Wright Buckwheat
Wulfen Euphorbia
Xylosma
Yankee Point California Lilac
Yarrow
Yellow Bahia
Yellow Bird Of Paradise
Yellow bulbine
Yellow Bush Lantana
Yellow Cotton
Yellow Dead Nettle
Yellow Eyed Grass
Yellow Lady Banks' Rose
Yellow Moraea, Fortnight Lily