Hi Uli: University of California at Berkeley Botanical Garden is a 'must see'. Amazing geophytes but also many other very unusual taxa from around the world. Boyce Tankersley Director of Living Plant Documentation Chicago Botanic Garden 1000 Lake Cook Road Glencoe, IL 60022 tel: 847-835-6841 fax: 847-835-1635 email: btankers@chicagobotanic.org