Umbelliferae.  Genus of summer-flowering perennials, ideal for informal gardens and back of borders.  Fully hardy, preferring sun, but will grow in semi-shade and any well-drained soil.                                                                                                                                                       Upright, architectural perennial. Small, white star-shaped flowers are borne in large, flat heads, one above another.  Has very finely divided mid-green leaves.  Very gardenworthy and fairly easy to grow.                                                                                                                         Ht. 1.5m (5ft) Spread 60cm (2ft)