Plant classification and nomenclature is a work in progress. It can be difficult to keep up for the plant enthusiast as well as the botanist. My work as accessions technician here at UBCBG, requires that I to try to do just that. The work has become easier in recent years due to the increase in good online botanical database resources. I thought forum readers might like to explore some of the websites I use to look up plant information. Here is a list of the major websites I use: 1. International Code of Botanical Nomenclature 2011 Melbourne Code International Code of Nomenclature for algae, fungi, and plants - 2005 Vienna Code INTERNATIONAL CODE OF BOTANICAL NOMENCLATURE online 2000 - St. Louis Code International Code of Botanical Nomenclature These are the rules of nomenclature, spelled out in detail. 2. Germplasm Resources Information Network (GRIN) Simple Query of Species Data - GRIN-Global Web v 18.104.22.168 This is usually the first site I check. The nomenclature is usually very up to date and accurate and they have good distribution info. 3. USDA Plants Profile Plants Profile for Penstemon washingtonensis (Washington beardtongue) is a related site that sometimes has extra information. Only has distribution within the USA. 4. RHS Find a plant Help, advice & tips from the RHS on all kinds of plants / RHS Gardening A good site to check names. They include named cultivars in their listings. You can type in the genus and any part of the rest of the name and it will return the full name. This can be very useful. The Brits don't always agree with the Americans so it is good to compare. Very limited info on distribution/origin and no family listing. 5. Angiosperm Phylogeny Website Angiosperm Phylogeny Website This site posts family designations based on the latest DNA research. We generally use this site for family determination. 6. International Plant Names Index IPNI: Plant Name search A strong authority on nomenclature, listing authors and name publication citations. 7. Tropicos from Missouri Botanical Garden Tropicos - Home I don't use this one too much, but it can confirm a choice if there are differing opinions at other sites. 8. Kew ePIC - Search page Will bring up various other sites that have record of the plant you are searching. Useful. 9. Kemper Center Plant Finder This is a site for gardeners to search out cultivars and garden varieties. Can be useful for cultivar descriptions and names. 10. efloras eFloras.org Home Very useful site. You can search all the floras at once. Flora of China and Flora of N. America are very good sites. They give full taxonomic descriptions, distributions, authors, families, synonyms. 11. E-Flora BC E-Flora BC: Electronic Atlas of the Plants of British Columbia Very good site for information on the plants of British Columbia. 12. African Plants Database CJB - Search Africa Fern Taxonomy Table of Genera and Species; Navigation Hub for Checklist of World Ferns. This is only a partial list. There are many regional floras and sites dedicated to specific groups or types of plants.