Flora Reipublicae Popularis Sinicae, volume 14
The Domestic Encyclopædia; Or, A Dictionary Of Facts, And Useful Knowledge
Finnish Biodiversity Information Facility
Taxonomy database of the U.S. National Center for Biotechnology Information
Global Biodiversity Information Facility
United States Department of Agriculture Plants Database
World Checklist of Selected Plant Families
Interim Register of Marine and Nonmarine Genera