Wild Indigo (Baptisia tinctoria) is a 1.5m high perennial plant growing in clearings of woods in central and eastern North America. http://www.purplesage.org.uk/profiles/wildindigo.htm
It is used in traditional herbalism as a blood cleanser (alterative) and antiseptic – very effective for colds and flu and for acne when used with other plants.
Wild Indigo is also used traditionally as a blue-black dye.
Five years ago at The Healing Clinic, Danesmead Wing, Fulford, York, I took on an extra business unit to give me more elbow room for dispensing herbal remedies and to sell natural remedies and foods retail. This unit I shared with a textile artist, Belinda Noda. Looking for common ground to think up a name for the door I came up with Wild Indigo.
The Healing Clinic has since moved to Club Chambers in Museum Street, York http://www.thehealingclinic.co.uk/and Wild Indigo is no longer their shop but this blog keeps the name going.