42 _ 204 



the necessary changes of nniin' hIhmi thr <iiliilivisii)iis of spocies an> raised to siH'rifir raiil; or 

 vice versa. 



Art. 30. Foiiii.s and lialf-l)r(>('(ls aiiiong ciiltivatod plants sliould reçoive t'ancv 

 naines, in common lani^uage, as ditt'erent as possible froni tiie latin iianies of tlie 

 species or varietie,s. Wlien tliey can he traced liack to a siieries. a sulispecies (ir a 

 liotanical varicty tins is indicated by a succession of nanies. 



Exaniple: I'elarg07ihim zonale Mi'»- l'ollork. 



t; 5. Na)iics of Jiyhrids ami lialf-brcrds (mules). 



Art. ."il. ilybrids between s])Ocies of the same genus, or presuniably so. are 

 designated liy a formula and. wlienever it seems useful or necessary. by a nanic. 



The foi-niula consists of tlic namcs or s])ecific epitliets of the two parents in 

 alphabeticai ordei' and connected by the sign x. When the hybrid is of known 

 exj)erimental oi'igin the formula may i)e made more iiiecise liy tiie addition of the 

 signs 9, i. 



The namc. whicli is snbject to tlie same rules as names of s|iecies. is distin- 

 guished froni tiie latter l)y altsence of an ordinal nninber and liy tlie sign X before 

 the naine. 



Exailiplt's: X Salix capreola -= Salix am lia X lapifa; Dii^ilalls luU-a y x piirpurea (^■, 

 Digitalis lutea ^ X purpjirea Ç. 



Art. ."52. Intergeneric hybrids (between s])ecies of différent gênera) oi' pre- 

 sumaiily sucii. are also designated ijy a formula, and, when it seems useful or necesary. 

 liy a name. 



Tlie formula consists of tiie names of the two paients. in a]]ihalietical ordei-. 



Tlic hybrid is associated with the one of the two gênera whi<'li précèdes the 

 otlier in alphabeticai order. The name is preceded by the sign x. 



I"^\amples: x Ammophila ballica = Ammophila arenaria x Calamagrostis epigrios. 



Art. ;î3. Ternary hybrids, or those of a higher order. are designated like 

 ordinary iiybiids by a formula and a name. 



E.\aiill)l('s; X Salix Straehleri =^ S. nurita x cinerea x rcpens or .S. laurita x ripcns) 

 X cinerea. 



Art. Î54. When there is reason to distingnish the différent forms of a hybrid 

 (|ileoniorphic hybrids, combinations between différent forms of collective species etc.) 

 the subdivisions are classed nndei' Ihe liybrid like the subdivisions of species nuder 

 a sjiecies. 



lOxamples: x Mentha villosn ß Lainarckii ( M. longifolia x rotunJ:/olia). Tlie prppoil- 

 iloiiiTiœ uf tlio cliaractere of one or otlier i)areiit iiiay lie imlicateil in tlio formulas in tlie following 

 inanner: Mentha longifolia > x rotundifolia. M. longifolia x < rotiindifolia, Cirsiiim supercanum 

 X rimilare, etc. etc. TIio |)articipatiün of a particular variety may also lie indicated. ßxaniple: 

 .Salix caprca x ilaphnoijri m\\\ pnlchra. 



Recommendation. 



XVII. Ilalf-hruods, or jircsumalily such, may ho desijruated hy a nauie and a formula. 

 Names of half-hreeds are intercalated aimm;,' the suhdivisions of a species preceded liy the sign x. 

 In the foi'iiiiil.'i the iiaiiies of the parents are in alphahetieal order. 



