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 18-24" (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.
Achillea ‘Moonshine’ at the Fine Gardening Plant Guide
Achillea ‘Moonshine’ at the Missouri Botanical Garden
Achillea ‘Moonshine’ at Achillea Plant
Achillea ‘Moonshine’ on molbio.nmsu.edu
Achillea ‘Moonshine’ description by Thomas H. Kent, last updated 12 Oct 2018.
Range: Zones 3-8: