Brief introduction to the plant kingdom with links to further information.

International Association for Plant Taxonomy searchable database.

Introduction to the Plant Kingdom with information on some of the divisions which make up this group.

Searchable database all 8375 currently recognized vascular plants in California, including 20000 photographs.

Introduction to the first land plants, known from fossils.

Authoritative scientific information on 12,000 taxa in Western Australia, including maps, images, descriptions, specimen, and nomenclatural information. Requires registration.

Database of the names and associated basic bibliographical details of all seed plants.

References on California plant names, meanings and derivations from Latin and Greek roots, with biographical information on western botanists and collectors.

Southern Illinois University's guide to the taxonomic and evolutionary relations among terrestrial plants, with extensive links to other resources.

Small collection of plant imagery, from University of Georgia.

Online USDA database of information, images, and links on plants in the USA, including crops and invasives. Search by name, geographic distribution, or other characteristics.

Glossary of Latin terms used in species names, from abbreviatulus to yunnanensis.

Full text index of the 1998 version of the Biota of North America Program's checklist.

Continuing project with annotated checklists of pteridophytes, gymnosperms, and most monocots, with links to dot maps for each taxon.

Distribution maps of vascular plants of Hokkaido, Japan.

Information including keys, descriptions and illustrations of species available in Adobe pdf format by Shinners and Mahler.

Images of hundreds of species of ferns, fern allies, and flowering plants, arranged by genus.

Large collection of photographs, arranged by family.

Taxonomically arranged images and summaries of family characteristics.

Searchable, illustrated collection.

Meanings of over 1000 root words used in scientific names of plants.

Database of references to publications on the taxonomy of flowering plants, gymnosperms, and ferns.

Responsible for the PLANTS database, which focuses on the vascular and non-vascular plants of the United States and its territories, including checklists, species abstracts, distribution data, crop information, plants symbols and plant growth data.

Electronic atlas project for the plants of British Columbia, covering life forms from vascular plants to algae, and topics from identification to scientific collections.

Information and photos of many species of caudiciforms - plants with thickened bases.

Herbarium holding the world's largest collection of Texas plant specimens. Site offers history, and information about staff and facility use.

Photographic herbarium organized by plant family and genus, with botanical descriptions and photos. Personal project, with about 60 families represented.

Checklists, images, maps, and identification guides.

A growing directory of the hierarchy from Kingdom down to species. Includes descriptive pages on selected species.

Information about a wide range of edible or otherwise useful plants, sorted by names and potential uses. Includes a searchable database.

A collaborative project of the International Association for Plant Taxonomy and the Smithsonian Institution, providing a compilation of generic names published for all organisms covered by the International Code of Botanical Nomenclature.

Online version of the series of books produced between 1840 and 1906 by editors Carl Friedrich Philipp von Martius, August Wilhelm Eichler and Ignatz Urban with the participation of 65 specialists. [English and Portuguese versions].

Einar Vaernes has produced a photograph gallery of Norwegian plants that he has photographed near Trondheim.

Photographic directory of plants from around the world arranged by family and genus.

Web-based volunteer project to digitize and catalog museum and university herbarium collections held in the UK.