Posted: 01/11/2013 at 21:20
They are very tough and alegedly if you break the leaf and sniff it smells of roast beef, hence the name of Stinking iris. I've come across two types one with a beige flower and one with blue. The flowers are very small. I think birds or rodents spread the seeds as once you've got them they'll spring up all over the place, although the are easy to uproot.