Achillea millefolium L.
A widespread medicinal perennial wildflower. Yarrow is a multi purpose plant. Aside from being an effective herb for human ailments as a diaphoretic, astringent and tonic in a million applications. It plays a major ecological role in landscapes, gardens and orchards housing everything from starlings to beneficial insects, beatles, moths and wasps . it also plays a major role in stabilizing slopes on sculpted berms . lastly: the flowers provide a phosphorus based biodynamic tea used in particular biodynamic preparations. I could go on.