40 



JOURNAL OF THE ROYAL nORTTCULTlTRAL SOClF/rV. 



If both the colour f;uM(^r;^ C nnd E ;iro pi'c^scMit s;i}) is coloured; 

 if either G or E is ;i]>stMii, ihc snp is colourless ;uul the plant is an 

 albino. Consequently dii'l'erent albinos may carry differenti coheir 

 factors; some may be G albinos, carrying the G factor, while others 

 may be E albinos, carrying the E factor. 



For instance, in the Gypripedium group results show that 

 Paphiopcilihiin chHosidji Saiulcrar, P. Lawrenceannm Tlycanum , P. X 

 Mandiiic, ami ])rc)]):iMy iiisiijiie Sanderkimivi and P. x BoseHii, 



Fig. 25. — Paphiopedilum insigne Sanderianum. {Orchid Revieiv.) (p. 44) 

 Probably a pure R albino. 



may be regarded as E albinos, while, on the other hand, P. bellatulum 

 album may be regarded as a G albino.''' 



Similarly in the Gattleya group, for instance, Cattleya Mossiae 

 Wageneri, C. Gaskelliana alha, C. x Hyeae Suzanne, C. intermedia 

 alba, C. X Hyeae Jungfrau, C. x Mackayi Dusseldorfii, G. x Mackayi 

 Undine, and C. x Peetersiae Myra may be regarded as E albinos, 

 C. X Peetersiae Myra being an impure E, having only a single presence 

 of E, the others being pure EE with a double presence of E. On the 



* It will of course be understood that C and R are purely arbitrary symbols 

 which conveniently serve to distinguish the two colour-factors from each other. 



