150 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Roman characters. [E.g. Alyssum mariiimum compactum, Pelar- 

 gonium zo7iale * Mrs. Pollock Papaver orientale ' Salmon.'] 



Article III. — When the names of varieties expressed in the vulgar 

 tongue are transferred to other languages they must not be translated, 

 but must be preserved in the language in which they were originally 

 published. 



Article IV. — The names of varieties should be expressed as far as 

 possible in a single word ; and the employment of not more than three 

 words is permitted as a maximum. 



The same rule applies to the specific names of hybrids.^ 



Article V. — The publication of a description of a 'variety in a dated 

 horticultural catalogue is valid, but the mention of a variety without 

 description in a catalogue, or in the report of an exhibition, is not valid 

 publication, even if a figure is given. 



It is desirable that descriptions of new varieties published in horti- 

 cultural catalogues, should also be published in periodical horticultural 

 papers. 



Article VI. — In order to be valid, the description of a new variety or 

 of a new hybrid must be drawn up either in German, English, French, 

 Italian or Latin. 



Article VII. — Hybrids between species of the same genus, or pre- 

 sumably such, are designated by a name and a formula. 



The name is distinguished from the names of species by the sign x 

 placed before the generic name. 



The formula, placed between brackets, consists of the specific names 

 of the two parents, connected by the sign x , the name of the seed- 

 bearing parent being placed first. The seed-bearing parent should be 

 indicated by the sign 5 . 



Article VIII. — The specific name of a hybrid may be expressed in 

 Latin or in any language that is written in Roman characters. 



[Thus both forms, x Cypripedium nitens and x C. ' Minotaur,' 

 are permissible.] 



Article IX. — All hybrids obtained by crossing the same two species 

 must carry the same specific name. All forms arising from the same 

 cross, or from successive crossings of varieties of these two species, 

 should be connected as varieties, with the same specific name. 



[Thus all plants arising from the crossing of C. Boioringiana and C. 

 Schilleriana must be called x C. lucida no matter how they may differ. 

 The various forms will be given varietal names.] 



Article X. — When the parents of a hybrid are transferred into 

 another genus, or into a new one, the name of the hybrid follows, and 

 the specific name is subject to the rules of priority, or others applic- 

 able to species under similar conditions, conforming with Article 48 of 

 the Rules of Botanical Nomenclature. 



Thus, for example, if. we admit the genus Paphiopedilum , x 

 Cypripedium Vervaetianum Rchb. f. in Gard. Chron., 1888, I., p. 712 

 (x C. Euryale Veitch. Man. Orch., iv., p. 83, 1889), becomes x 



