Nomenclature & Botanical Names Web Links:

The Code
     International Code of Nomenclature 2018 (Shenzhen Code) 

International Botanic Congress 2024
     Madrid Spain, 21-27 July 2024 

Nomenclature Compendia
International Association for Plant Taxonomy (IAPT)
International Plant Names Index (IPNI)
Plants of the World Online
The Plant List

Guides to Nomenclature
How to Find Nomenclatural Help
Turland (2019): The Code Decoded

Nomenclature Databases
Royal Botanic Garden Vascular Plant Families and Genera Database 
 Alphabetical Listing by Family of Validly Published Suprageneric Names (J.L. Reveal)
 Alphabetical Listing by Genera of Validly Published Suprageneric Names (J.L. Reveal) 
A Checklist of Family and Suprafamilial Names for Extant Vascular Plants (J.L. Reveal)
Classification of Extant Vascular Plants - An Expanded Family Scheme (J. L. Reveal) 

Cultivars/Special Groups/Common Names
 Horticopia On-line Plant Information 
 Raintree 
 Royal Horticultural Society Plant Finder 
 Survey of Economic Plants for Arid and Semi-Arid Lands (Royal Bot. Gardens, Kew) 
 The Plant Press Dictionary of Common Names
 USDA Natural Resources Conservation Service