The RHS is the International Registration Authority for Delphinium. Although the original check-list and addendum are now out of print, a cumulative supplement to the Register, covering 25 years, is available. This includes cultivars and cultivar-groups, and contains a brief description as well as details of parentage and raiser for each cultivar. These publications are available from the mail order department of RHS Enterprises at Wisley.
For an application form to register a delphinum click here
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Delphinium Register Cumulative Supplement 1996
This contains names, origins and descriptions of all cultivars and cultivar-groups registered between 1970 and 31 October 1995. 28pp. Cost £3.50. It is available from The Wisley Shop
Subsequent annual supplements are published in the Yearbook of the Delphinium Society.
Further
reading
Anon. (1949). A Tentative Check-list of Delphinium Names. London: RHS.
Anon. (1970). Addendum to a Tentative Check-list of Delphinium Names. London: RHS.
Leslie, A.C. (ed.) (1996) The International Delphinium Register, Cumulative Supplement 1970-1995. London: RHS.
Links
Registration of cultivar names