yarrow or milfoil is a familiar plant of pastures an roadsides
all over the country. Its lower leaves are long and narrow and
divided into slender feathery segments. The flowering stem, about
a foot to eighteen inches tall, carries a few similar but shorter
leaves, and a dense corymb of flower-heads. These are of the composite
type, with yellowish disk and white - or occasionally pink - ray
florets. They appear from June onwards.