Flower buds contain salicylic acid, a precurser to the synthesized form, acetylsalicylic acid, commonly known as aspirin. Plant tops yield a greenish-yellow dye. Roots are the source of a black dye used in the Outer Hebrides and Scotland for dying tartans.
Source of plant
Plants 3' tall, 1' wide, Foliage divided; flowers white, double; plants very prone to mildew.
USDA Hardiness Zone
medicinal/pharmaceutical, other ethnobotanical uses