We're not sure who issued this list, the references we have to it do not have a source quoted thus we assume it was issued by a Florist guild or similar.
The earliest reference to this list we have found is in the early 1960's This list associates flowers with each anniversary year up to the 15th and then ever 5th year up to the 50th.
Its a hard list to follow as some of the flowers listed are seasonal and as your anniversary falls in a specific season every year then some of the flowers would not be available for some of the years. Having said that its a great fall back plan for men if the relevant flower is in season.