Families of Flowering Plants by Watson and Dallwitz provides comprehensive descriptions of the families of flowering plants. Glossary of Roots of Botanical Names provides over 1,000 root words of botanical names. Gray Herbarium Index is a guide to place of publication of all flowering plant names of New World plants. Harvard University Herbaria Publications Database makes use of the internationally accepted standards to verify the entry of publication names in the type specimen and Gray Card Index databases in the Harvard University Herbaria. Harvard University Herbaria Type Specimen Database is a database of the type specimens housed in the Harvard University herbaria.
Herbals is a multimedia presentation on several of the most important ancient botanical herbals.
Index Herbariorum , a guide to US herbaria. Index Nominum Genericorum is a compilation of generic names published for all organisms covered by the International Code of Botanical Nomenclature. Index to Botanical Authors lists the proper abbreviation for every botanist who has published a new name. Index to Plant Chromosome Numbers provides the chromosome numbers of flowering plants. Internet Directory for Botany is a comprehensive collection of botanical resources on the web.