On 24 May 2010, at 18:37, Jane McGary wrote: > 'Holden Clough' My understanding is that 'Holden Clough' has been proven to be hybrid between I. pseudacorus and I. virginiana. > It is a vigorous spreader Tell me about it! I tore mine out five or so years ago and gave all the pieces away. Let someone else deal with that thug. I can tolerate thuggishness in a garden plant *if* the plant adds significantly to the garden scene, but 'Holden Clough's flowers are of a very muddy color overall and hardly noticeable from a distance. -- Rodger Whitlock Victoria, British Columbia, Canada Maritime Zone 8, a cool Mediterranean climate on beautiful Vancouver Island http://maps.google.ca/maps/…