HOETICULTUEAL NOMENCLATURE. 



151 



Paphiopedihini Vervaetianum and not x P. Euryale Stein Orch., p. 466 

 (1892). 



Article XI. — The names of horticultural varieties of hybrids should 

 always be expressed in the vulgar tongue. 



Article XIL — Cross breeds (crosses between varieties or forms of a 

 single species) and ternary hybrids or those of a higher order (crosses 

 between species of the same genus) are designated by a name or a for- 

 mula, following the same rules as for ordinary hybrids. (Art. VII.) 



For ordinary use and in the case of the offspring of well-known 

 hybrids, the formula may be omitted, and the name alone serve. 



Article XIII . — Bigeneric hybrids are also designated by a name and 

 a formula. 



The generic name is formed by the combination of the generic 

 names of the parents into a single word composed as far as possible so 

 that the names of the two genera entering into the composition of the 

 hybrid are easily recognizable ; it is preceded by the sign x and followed 

 by a specific name. 



The specific name is subject to the same rules as are those of 

 ordinary hybrids (Arts. IV. and VIII.). 



The formula is written conformably with Article VII. 



Article XIV. — Multigeneric hybrids receive a conventional generic 

 name preferably that of a distinguished man, to which is added the 

 termination ara. A distinct generic name will be formed for each differ- 

 ent combination of genera. Thus all combinations of the gfenera 

 Brassavola, Cattleya, Laelia, and Epidendrum, no matter in what order 

 they may be intercrossed, receive the same generic name which would 

 be, for example, Linneara. 



As an exception the names of the trigeneric hybrids Brassocattlaelia 

 and Sophrocattlaelia, already in use, are retained. 



Article XV. — For a new hybrid to be considered as published it 

 should be named according to the rules, the formula of its parentage and 

 a description of the hybrid itself being given. 



Publication is effected in the same manner as with horticultural 

 varieties of species, as set out in Articles V. and VI. 



Article XVI. — In any case where the rules of horticultural nomen- 

 clature would be actually contrary to practice permitted or tolerated at 

 present, they would not have a retrospective action. 



[We have to acknowledge our indebtedness to M. A. Cognieaux, F.L.S., the 

 Secretary of the Section of the Congress on Nomenclature, who compiled these 

 rules, and to the Editor of Le Bulletin de la SocieU Koyale cle Botanique de 

 Belgique, where they were first published, for kind permission to translate and 

 publish them here.] 



