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Western Yarrow

Achillea millefolium

Details & Attributes

Plant Type(s) Perennial
Native to Arizona Yes!
Water Needs Moderate-high
Sun Partial shade, shade
Pollinators Butterflies, bees
Has Spines No
In relative feet, width by height
2 × 2
Freeze Tolerant No
Flowering Season June-September
Flower Color White sometimes pink
Minimum Temperature Range -40 °F
Leaf Description Delicately compound, appearing fern-like
Fruit Inconspicuous.
In years
View on SEINet View SEINet Entry
Range Map View SEINet Range Map
Elevation Range 5500-11500 ft.
Ethnobotany A plant with a worldwide history of medicinal use, the genus Achillea is a reference to the Greek hero Achilles who reportedly used the plant to heal his soldier's wounds. An infusion of the whole plant was used to treat colds and fevers, sore throats, grippe, respiratory disorders, as a diuretic, to expel afterbirth, to suppress the menses, headaches, for liver troubles, hemorrhages, to assist in sleeplessness, chest pains, coughs, vomiting, sunstroke, cramps, venereal disease, as a blood purifier, an antibiotic, and to aid gastroenteritis. The leaves were used as a poultice for sores, swellings, rheumatism, bruises, and burns. An infusion was also used as a stimulant and eyewash for horses.
Description Yarrow is an incredibly widespread species, but is primarily found in mountainous habitats in Arizona. This plant spreads by rhizomes (underground stems) and can form large patches in moist soils. In low elevation gardens this plant should be grown in shade but performs surprisingly well if given extra moisture during the hot season.