Web Directory by Internet-Web-Directory.com

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

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

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

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.

Information about the research themes and training undertaken at the national herbarium of the Netherlands, with links to the three contributary universities.

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.

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.