(white). The following are recipients of the Royal Horticultural Society's Award of Garden Merit: 'Credo' 'Lachsschönheit' (Galaxy Series) 'Martina' 'Lansdorferglut' The many hybrids of this species designated Achillea × taygetea are useful garden subjects, including: 'Appleblossom', 'Fanal', 'Hoffnung', and 'Moonshine'. Toxicity Yarrow can cause allergic skin rashes. It reportedly can induce menstruation and cause miscarriages. According to the American Society for the Prevention of Cruelty to Animals, yarrow is toxic to dogs, cats, and horses, causing increased urination, vomiting, diarrhea and dermatitis. When consumed by cows, an unfavorable flavor is given to their milk. In a standard rodent model for reproductive toxicity, aqueous extracts of yarrow produced a significant increase in the percentage of abnormal sperm. Uses Traditional medicine A. millefolium was used in traditional medicine, in part due to its astringent properties and the mild laxative effect of its leaves. Yarrow and its North American varieties were traditionally used by many Native American nations. The Navajo historically considered it a "life medicine" and chewed the plant for toothaches and used its infusions for earaches. The Miwok in California used the plant as an analgesic and head cold remedy. Native American nations used the plant for healing cuts and abrasions, relief from earaches and throat infections, as well as for an eyewash. Common yarrow was used by Plains indigenous peoples to reduce pain or fever and aid sleep. In the early 20th century, some Ojibwe people used a decoction of yarrow leaves on hot stones and inhaled it to treat headaches, or applied decoctions of the root onto skin for its stimulating effect. Food The entire plant is reportedly edible and nutritious, but it is advised not to consume much. The foliage is pungent; both its leaves and flowers are bitter and astringent. The leaves can be eaten young; raw, they can be added to salad. The leaves, with an aniseed-grass flavour, can be brewed as tea. In the Middle Ages, yarrow was part of a herbal mixture known as gruit used in the flavoring of beer prior to the use of hops. The flowers and leaves are used in making some liquors and bitters. Other uses Yarrow is considered an especially useful companion plant, attracting beneficial insects and repelling some pests. It attracts predatory wasps, which drink the nectar and then use insect pests as food for their larvae. Similarly, it attracts ladybirds and hoverflies. A. millefolium can be