From Ken Walker's Garden http://home.pacbell.net/kenww/my_iris/crested/crested.htm
These bloom for weeks in late winter/early spring.
Iris confusa. 16 Feb 2004. First one of the season for me.
Iris confusa. 30 Mar 2004. Just about done blooming.
My Garden - Vancouver, B.C. Canada
Center view looking down at pond at the UC Berkeley Botanical Garden.
This shows how they grow-Inset shows "runners" and "bamboo joints". Nice fine roots.