Australia: West Australia FloraBase.
Canada: Flora of North America
China: Flora of China
United States: Flora of North America. Hawaii
DELTA Interactive Keys and Databases.
Families of Flowering Plants. The family limits here can be other than those adopted in these pages.
Field Techniques Used by Missouri Botanical Garden.
Hosts: The Hostplants and Caterpillars Database.
Index Nominum Genericorum (Plantarum).
Indices Nominum Supragenericorum Plantarum Vascularium .
International Code of Nomenclature for Algae, Fungi, and Plants (Melbourne Code).
International Plant Names Index.
Johansson, J. T. 2013 (and onwards). The Phylogeny of Angiosperms .
National Cleared Leaf Collecion.
USDA-APHIS Concordance of Family Names.
Vascular Plant Families and Genera (Royal Botanic Gardens, Kew). Again, family limits here may be other than those adopted in these pages.
World Checklist of Selected Plant Families (Royal Botanic Gardens, Kew).
W3TROPICOS of Missouri Botanical Garden.
Andean Botanical Information System (Choose Plant Families from left pane)
An Array of Botanical Images - James Reveal
African Plants - A Photo Guide
The Association of Societies for Growing Australian Plants
Arizona State University Vascular Plant Herbarium - Southwest Environmental Information Network
Atlas of Florida Vascular Plants
Flore et groupements végétaux du sud-ouest Marocain
Biodiversity of the Hengduan Mountains
Carnivorous Plants and Their Habitats
Connecticut Botanical Society Photo Gallery
Conspectus of the Vascular Plants of Madagascar
Cuticle Database, Penn State University
A Digital Flora of Newfoundland and Labrador Vascular Plants
Garden Plant Conservation - NCCPG
Gardenweek Virtual Visits Archive
Len Webb Ecological Images Collection
National Plant Photographic Index - ANBG
Noble Plants (Images in Class Notes & Handouts pages)
The Parasitic Plant Collection
The Plant Image Collection website - Smithsonian Institute, 18,000+ images
Seagrasses of Western Australia
Smithsonian Institution Plant of the Week
Steven Wolf's Plant Image Database
Tasmanian Treasures - Australian Plants Society, Tasmania
Thomas Schöpke Plant Image Gallery (scroll down in left pane)
University of Basel botanical images database
University of Connecticut Greenhouse Image Collection
University of Connecticut Plant Database
University of Tasmania Flora of Mount Field
University of Wisconsin Plant Systematics Collection
Vascular Plant Families (Image Gallery) - UH Botany
Vascular Plant Image Gallery (TAMU - BWG)
Virtual Field Herbarium - Image Database
W3TROPICOS of Missouri Botanical Garden
World List of Plants with Extrafloral Nectaries
Australia's Virtual Herbarium - the flora of Australia as a whole.
BONAP's Taxonomic Data Center - the flora of the U.S.A. and Canada.
FloraBase - the flora of West Australia.
GBIF - the world.
TROPICOS - the world.
Aizoaceae - Interactive Mesembs
Apocynaceae - Periplocoideae, Secamonoideae, and Asclepiadoideae and stapeliads
Apodanthaceae - The Parasitic Plant Collection
Aizoaceae - Interactive Mesembs
Araceae - CATE-Araceae
Arecaceae - PALMweb
Asteraceae: Madiinae - Madiinae Showcase
Balanophoraceae - The Parasitic Plant Collection
Boraginaceae: "Lennoaceae" - The Parasitic Plant Collection
Brassicaceae - BrassiBase
Byblidaceae - the Carnivorous Plants Database
Caricaceae - e-Monograph (Carvalho 2013)
Cephalotaceae - the Carnivorous Plants Database
Cistaceae: Cistus and Halimium website
Convolvulaceae: Convolvulaceae Unlimited, also Cuscuta - The Parasitic Plant Collection, also Digital Atlas of Cuscuta
Cupressaceae - The Gymnosperm Database
Cycadaceae - The Gymnosperm Database, The Cycad Pages
Cynomoriaceae - The Parasitic Plant Collection
Cyperaceae: Carex - Carex interactive identification key
Cytinaceae - The Parasitic Plant Collection
Droseraceae - the Carnivorous Plants Database
Drosophyllaceae - the Carnivorous Plants Database
Emblingiaceae - FloraBase
Euphorbiaceae: Euphorbia Euphorbia list, Euphorbia Planet Biodiversity Index home page - note, does not function with Internet Explorer.
Ericaceae: neotropical Vaccinieae Neotropical blueberries
Fabaceae: Mimosoideae World Wide Wattle website
Gentianaceae - Gentian Research Network
Gesneriaceae - World Checklist and Bibliography of Gesneriaceae
Ginkgoaceae - The Gymnosperm Database
Gnetaceae - The Gymnosperm Database
Hydnoraceae - The Parasitic Plant Collection
Krameriaceae - The Parasitic Plant Collection
Lacistemataceae - Lacistemataceae website
Lauraceae: Cassytha - The Parasitic Plant Collection
Lecythidaceae - The Lecythidaceae Pages
Lentibulariaceae - the Carnivorous Plants Database
Loranthaceae - The Parasitic Plant Collection
Malvaceae - Malvaceae Pages website
Melastomatacaceae - Melastomataceae of the World
Misodendraceae - The Parasitic Plant Collection
Malpighiaceae - Malpighiaceae
Mitrastemonaceae - The Parasitic Plant Collection
Nepenthaceae - the Carnivorous Plants Database
Opiliaceae - The Parasitic Plant Collection
Orobanchaceae - The Parasitic Plant Collection
Onagraceae - Onagraceae website
Pinaceae - The Gymnosperm Database
Poaceae - Catalogue of New World Grasses [Includes "A worldwide phylogenetic classification of Poaceae (Gramineae): cao, capim, çayir, çimen, darbha, ghaas, ghas, gish, gramas, graminius, gräser, grasses, gyokh, he-ben-ke, hullu, kasa, kusa, nyasi, pastos, pillu, pullu, zlaki, etc."]
Podocarpaceae - The Gymnosperm Database
Rafflesiaceae - The Parasitic Plant Collection
Restionaceae - African Restionaceae
Roridulaceae - the Carnivorous Plants Database
Santalaceae - The Parasitic Plant Collection
Sarraceniaceae - the Carnivorous Plants Database
Solanaceae - Solanaceae Source
Taxaceae - The Gymnosperm Database
Xyridaceae - The Xyridaceae Pages
Zamiaceae - The Gymnosperm Database, The Cycad Pages