This variety of yarrow is a cultivar, a cross between Achillea clypeolata and A. ‘Taygetea’. It was
created in the 1950s by a guy named Alan Bloom. The flowers
are bright lemon yellow.
Identification: Plants are about 1½-2′ (45-60 cm) in height, somewhat
shorter than wild yarrow. The gray-green, finely divided leaves resembling
feathers are typical of yarrows. The flowerheads, up to 4″ (10 cm) across, dense, and long lasting, are
most notable for their bright color. This variety does not spread on its own, so you will probably see
it only in gardens.