Barbara Thiers, Ph.D., Director of the The William and Lynda Steere Herbarium at the New York Botanical Garden, reveals the inner workings of this unique collection of over 7 million dried plant specimens.
Search for the Steere Herbarium and choose the link for the C.V. Starr Virutal Herbarium and/or follow the links to the Virtual Herbarium from the sweetgum nybg org link. I'll try to put the link in the next comment, but comments with links are often deleted.