146 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



de maniere a eviter les confusions regrettables avec ceux employ6s 

 par les botanistes pour la denomination des especes." (" Jour, de la 

 Soc." May 1909, p. 320.) 

 Reply. — 



Apply the rule enunciated in Section 2, i.e. that varietal names 

 may be either of the Latin form or in the vernacular. 



13. Oross-breds (Crosses between varieties' or forms of the same 

 species). 



Nom. Bot. Eecommendation XVII. Half-breeds, or presumably 

 such, may be designated by a name and a formula. The names of 

 half-breeds are intercalated among the sub-divisions of the species and 

 preceded by the sign x . In the formula, the names of the parents 

 are in alphabetical order. 



Is any modification desirable in this recommendation? 



Reply. — 



See Question 2. 



14. Ternary hybrids or hybrids of a higher order. (Crosses between 

 hybrids of the same genus.) 



Nom. Bot. Art. 33. — " Ternary hybrids, or those of a higher order, 

 are designated, like ordinary hybrids, by a formula, and when necessary 

 by a name." 



Example : Cypripedium x Ainsworthii (C. x Measuresianum ? x 

 C. X Spicerianum $ ). 



In practice should the use of a formula alone be allowed as is per- 

 mitted by Article 33, or may a name only be used, or is it desirable to 

 use both a formula and a name ? 



Reply. — 



A name (following the principles laid down under Questions 

 8 and 9) should be given and a formula when possible. 



15. Bi-generic hybrids. 



I. iVom. Bot. Art. 32. — " Intergeneric hybrids (between species of 

 different genera), or presumably such, are also designated by a formula, 

 and when it seems useful or necessary by a name. 



" The formula consists of the names of the two parents in alpha- 

 betical order and connected by the sign x . " 



" The hybrid is associated with the one of the two genera that pre- 

 cedes the other in alphabetical order. The name is preceded by the 

 sign X . " 



II. Eule adopted long since by the Eoyal Horticultural Society of 

 London : 



"Artificial hybrids between genera: The generic name is of the 

 Latin form, being a combination of the names of the parents, and the j 

 specific name is also Latin separated from the former by the sign | 

 of hybridity x . " j 



Example: 1st system. — Brassavola glaiica x Laelia cinnabarina \^ 

 (formula alone), or Brassavola x Clio [B. glatica x Laelia cinnabarinal. 

 name and formula). 



