African Flowering Plants Database
http://www.ville-ge.ch/cjb/bd/africa/index.php

Associação Ibero-Macaronésica de Jardins Botânicos
http://www.aimjb.org

Biodiversity International
http://www.bioversityinternational.org

Botanic Gardens Conservation International
http://www.bgci.org

Classification of Flowering Plants
http://www.systbot.uu.se/classification/classif_families.htm

Convention on Biological Diversity (CBD)
http://www.biodiv.org/default.shtml

Convention on International Trade in Endangered Species (CITES)
http://www.cites.org/

Electronic Plant Information Centre. Royal Botanic Gardens Kew
http://www.kew.org/searchepic/searchpage.do

Families of Flowering Plants: Descriptions, Illustrations, Identification, Information Retrieval
http://delta-intkey.com/angio/

Germplasm Resources Information Network (GRIN)
http://www.ars-grin.gov/cgi-bin/npgs/html/index.pl

Global Biodiversity Information Facility (GBIF)
http://www.europe.gbif.net/portal/index.jsp

Global Environment Facility (GEF)
http://www.gefweb.org/

Index Herbariorum
http://sciweb.nybg.org/science2/IndexHerbariorum.asp

Index Nominum Genericorum (ING)
http://ravenel.si.edu/botany/ing/

Index of Botanists
http://cms.huh.harvard.edu/databases/botanists

Integrated Taxonomic Information System (ITIS)
http://www.itis.gov/

International Association for Plant Taxonomy (IAPT)
http://www.botanik.univie.ac.at/iapt/

International Code of Botanical Nomenclature (Saint Louis Code)
http://www.bgbm.org/iapt/nomenclature/code/SaintLouis/0000St.Luistitle.htm

International Geosphere-Biosphere Programme (IGBP)
http://www.igbp.kva.se/

International Organization for Plant Information (IOPI)
http://plantnet.rbgsyd.nsw.gov.au/iopi/iopihome.htm

International Plant Names Index (IPNI)
http://www.ipni.org/index.html

International Union for the Conservation of Nature and Natural Resources (IUCN)
http:/www.iucn.org

Internet Directory for Botany
http://www.botany.net/IDB/

Missouri Botanical Garden’s VAST (Vascular Tropics) nomenclature database
http://mobot.mobot.org/W3T/Search/vast.html

Royal Botanic Gardens Kew
http://www.rbgkew.org.uk

Royal Horticultural Society
http://www.rhs.org.uk

Taxonomic Databases Working Group (TDWG)
http://www.tdwg.org/

United Nations Convention to Combat Desertification (UNCCD)
http://www.unccd.int/

United Nations Environment Programme - World Conservation Monitoring Centre (WCMC)
http://www.unep-wcmc.org/

UN Millennium Development Goals
http://www.un.org/millenniumgoals/

World Checklist of Selected Plant Families. Royal Botanic Gardens Kew
http://www.kew.org/wcsp/qsearch.do

World Heritage Information Network
http://whc.unesco.org/pg.cfm?cid=31

W3 TROPICOS
http://mobot.mobot.org/W3T/Search/vast.html

World Wildlife Fund (WWF)
http://www.wwf.org/