Cauliflower groups. In the 1st century AD, Pliny included what he called "cyma" among his descriptions of cultivated plants in "Natural History": ""Ex omnibus brassicae generibus suavissima est cyma,"" ("Of all the varieties of cabbage the most pleasant-tasted is "cyma""). Pliny's descriptions likely refer to the flowering heads of an earlier cultivated variety of "Brassica oleracea", but comes close to describing modern cauliflower. It is found in the writings of the Arab botanists Ibn al-'Awwam and Ibn al-Baitar, in the 12th and 13th centuries when its origins were said to be Cyprus. François Pierre La Varenne employed "chouxfleurs" in "Le cuisinier
Cultivated plant taxonomy provision for the cultigens of horticultural nomenclature was to remain in the "Botanical Code" (with a minor amendment in 1935 suggesting the use of the letter 'c' before the horticultural name and antedating formal recognition of the cultivar) through 1906, 1912 and 1935 until the separation, in 1953, of the "Horticultural Code", precursor to the "International Code of Nomenclature for Cultivated Plants" ("Cultivated Plant Code"). In 1900 there was the first International Botanical Congress and in 1905 at the second Congress in Vienna an agreed set of nomenclatural rules was established, the "Vienna Rules", which became known from then on