International Code of Botanical Nomenclature ("St Louis Code") adopted by the XVI International Botanical Congress, St Louis,Missouri, July-August 1999, regulates the naming of botanical taxa: http://www.bgbm.org/iapt/nomenclature/code/ SaintLouis/0000St.Luistitle.htm Names of hybrids, Appendix I of the International Code of Botanical Nomenclature ("St Louis Code") regulates the naming of hybrids: http://www.bgbm.org/iapt/nomenclature /code/SaintLouis/0001ICSLContents.htm ISHS Commission Registration and Nomenclature, International Cultivar Registration Authorities (ICRAs): http://www.ishs.org/icra/index.htm How to name a new cultivar, by Piers Trehane: http://www.ishs.org/icra/index.htm Royal Horticultural Society Colour Chart, the latest version published May 2001: http://www.rhs.org.uk/publications/ pubs/garden0501/colour_chart.asp Hortax News - An occasional newsletter from The Taxonomy Group; archive page: http://www.hortax.org.uk/hortaxnews/ index.html#part4 Standard Specimens and Standard Illustrations, by Piers Trehane, Hortax News Vol 1, Part 1 - 10 December 1993: http://www.hortax.org.uk/hortaxnews/text1.html#sect7 Using colour charts, by Diana Miller, Hortax News Vol. 1, Part 4 - 29 April 1998: http://www.hortax.org.uk/hortaxnews/text4.html#sect11 Back To Top Arboretum The Arboretum houses the world’s largest lilac collection. See what other collections can be seen here. Science contacts Ask our science staff a question about the science and conservation program. Science fact sheets Download a fact sheet and learn about our restoration projects. Directions Click here to see how easy we are to find. Local weather Find out the local forecast before you head out!
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