Experiments conducted on the tree swallow, which does not use yarrow, suggest adding yarrow to nests inhibits the growth of parasites.
en.wikipedia.org Common flowers in the wilderness include forget-me-not, alpine buttercup, bluebell, arnica, larkspur, yarrow, sulfur buckwheat, geranium, and columbine.
en.wikipedia.org Women would pick herbs for herbal remedies, mostly juniper berries, ribwort plantain, yarrow, thyme, and others.
en.wikipedia.org Some common astringent agents include alum, acacia, sage, yarrow, witch hazel, bayberry, distilled vinegar, very cold water, and rubbing alcohol.
en.wikipedia.org However, the yarrow has feathery looking leaves which are pinnately separated into small narrow segments.
en.wikipedia.org