Cenolophium
Cenolophium is a genus of flowering plants in the carrot family Apiaceae. Its only species is Cenolophium denudatum, native to Europe and Asia. A herbaceous perennial, it grows to tall by wide, with dark green divided leaves and, in summer, many umbels of tiny pale green or white flowers on branching naked stems. The stems are sometimes purple in colour. The flowers are attractive to numerous insects.
In cultivation in the UK, this plant has gained the Royal Horticultural Society's Award of Garden Merit.