Introduction to the Green Kingdom Brief introduction to the plant kingdom with links to further information. http://www.ucmp.berkeley.edu/plants/plantae.html

Names in Current Use for Extant Plant Genera International Association for Plant Taxonomy searchable database. http://www.bgbm.fu-berlin.de/iapt/ncu/genera/NCUGQuery.htm

Natural Perspective: Plant Kingdom Introduction to the Plant Kingdom with information on some of the divisions which make up this group. http://www.perspective.com/nature/plantae/

CalFlora Database Searchable database all 8375 currently recognized vascular plants in California, including 20000 photographs. http://www.calflora.org/

The Oldest Land Plants Introduction to the first land plants, known from fossils. http://www.xs4all.nl/~steurh/eng/old1.html

FloraBase - The Flora of Western Australia Authoritative scientific information on 12,000 taxa in Western Australia, including maps, images, descriptions, specimen, and nomenclatural information. Requires registration. http://florabase.calm.wa.gov.au/

International Plant Names Index Database of the names and associated basic bibliographical details of all seed plants. http://www.ipni.org/

Botanical Word Meanings and Name Derivations References on California plant names, meanings and derivations from Latin and Greek roots, with biographical information on western botanists and collectors. http://www.calflora.net/

Land Plants Online Southern Illinois University's guide to the taxonomic and evolutionary relations among terrestrial plants, with extensive links to other resources. http://www.science.siu.edu/landplants/

Forestry Images - Plants Small collection of plant imagery, from University of Georgia. http://www.forestryimages.org/plants.cfm

PLANTS National Database 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. http://plants.usda.gov/

Index Nominum Genericorum 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. http://rathbun.si.edu/botany/ing/

Dictionary of Botanical Epithets Glossary of Latin terms used in species names, from abbreviatulus to yunnanensis. http://www.winternet.com/~chuckg/dictionary.html

Synonymized Checklist of the Vascular Flora of the United States Full text index of the 1998 version of the Biota of North America Program's checklist. http://www.csdl.tamu.edu/FLORA/b98/check98.htm

Kingdom: Plantae A growing directory of the hierarchy, from Kingdom down to species, with common names included, and descriptive pages on selected species. http://www.cloudnet.com/~djeans/index.htm

Atlas of the Flora of New England Continuing project with annotated checklists of pteridophytes, gymnosperms, and most monocots, with links to dot maps for each taxon. http://neatlas.huh.harvard.edu/

Flora of Hokkaido Distribution maps of vascular plants of Hokkaido, Japan. http://www.hinoma.com/maps/index.shtml

Illustrated Flora of North Central Texas Information including keys, descriptions and illustrations of species available in Adobe pdf format by Shinners and Mahler. http://artemis.austincollege.edu/acad/bio/gdiggs/EastTX/ETinfo.htm

Hawaiian Native Plant Genera Images of hundreds of species of ferns, fern allies, and flowering plants, arranged by genus. http://www.botany.hawaii.edu/faculty/carr/natives.htm

Digital Flora of Texas - Vascular Plant Image Library Large collection of photographs, arranged by family. http://www.csdl.tamu.edu/FLORA/gallery.htm