I think the answer may be in the archives from January 2013. If it is the same. A search of 'street walker' or 'sleepwalker' will bring it up to check out.
--- In firstname.lastname@example.org, AIS Janet Smith <gbyp456@...> wrote:
> Several months ago I asked if anyone had Street Walker and an extra rhizome.
> I have lost the email of someone who said they did and would provide it.
> So am asking again in hope of finding that person or someone who might have
> Janet Smith
> AIS Coordinator, Calendar, Digital Programs/Slides, Image/Photo, Photo
> Fresno Iris Society, Secretary 2013
> P O Box 1585
> Coarsegold, CA 93614-1585
> 559-683-0447 (home and fax)