XCVi PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



REPOET ON THE BEUSSELS HORTICULTURAL CONGRESS 

 (SECTION 7).— NOMENCLATURE. 



Apeil 30 TO May 3, 1910. 



Dr. A. B. Rendle, M.A., F.R.S., F.L.S., and Mr. E. A. Bowles, 

 M.A., F.L.S., F.E.S., the delegates from the Royal Horticultural 

 Society to the Horticultural Congress at Brussels, report that the 

 findings on the various questions before the Congress concerning 

 nomenclature of garden plants were as follows : — 



Question 1. — It was decided to adopt the rules of botanical nomen- 

 clature adopted by the Vienna Congress of 1905, with some modifica- 

 tions and additions as regards horticultural varieties and hybrids of 

 cultivated plants. 



Question 2. — It was decided that the names of - garden varieties 

 might be expressed either in Latin or the vulgar tongue. 



Question 3. — Names in the vulgar tongue are not to be translated 

 when used in any other country. 



Question 4. — Names of garden varieties should be expressed as far 

 as possible by one word, or by two, or by three at the most. 



Question 5. — In addition to the methods of publication allowed by 

 the botanical rules, the publication of a garden variety with a descrip- 

 tion in a nurseryman's catalogue bearing a date is valid. But mere 

 mention of a variety, or a figure without a description, is not valid 

 publication. It is recommended that such descriptions be further 

 published in some horticultural periodical. 



Question 6. — -The description must be drawn up in one of the fol- 

 lowing languages : Latin, English, French, German, Italian. 



Question 7. — Hybrids between species of the same genus are 

 designated by a name and a formula. The sign x is placed before the 

 generic name. The formula consists of the specific names of the tw^o 

 parents united by the sign x and placed in brackets; the name of the 

 seed-bearing parent stands first and is indicated by the sign ? . 



Question 8.-— The specific name of a hybrid may be expressed in 

 Latin, or in a vulgar tongue written in roman characters. 



Question 9.- — The specific name of a hybrid should be expressed if 

 possible by a single word; but it is permissible to use two or three 

 words. 



Question 10. —This is provided for by the answ^er to the last 

 question. 



Question 11.-— All the hybrids obtained by crossing the same two 

 species must bear the same specific name. All forms resulting from 

 the same crossing or from successive crossings of varieties of these two 

 species should be associated as varieties under the same specific name. 



Question 12. — The names of horticultural varieties of hybrids must 

 be expressed in the vulgar tongue. 



Questions 13 and 14. — Crosses between varieties of one species and 

 hybrids of the third or higher order are designated by a name or a 

 formula, and follow the rules for ordinary hybrids. 



