Missouri Botanical Garden's electronic database of all of the nomenclatural, bibliographic, and specimen data of nearly 1.3 million scientific names and over 4.4 million specimen records. Search by scientific or common name, or search for Images.
The Herbarium at the Royal Botanic Gardens Kew houses approximately 7 million specimens, collected from all around the world. Search by Family, Scientific Name, or Collector (see what Darwin collected!)
The online herbarium of the New York Botanical Garden includes over 3 million specimen records and 2 million images. Search by family, scientific name, collector, and type status.