■176 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



PREPOTENT GENERIC CROSSES. 

 Certain crosses between distinct genera have, curiously 

 enough, flowered the same genus and species as their mother 

 parent. The following is a complete list so far as I have been 

 able to ascertain : — 



Phragmipedium x Paphiopedium. 



(South American Cypripedium x E. Indian Cypripedium.) 



(1) Phrag. longifolium Hartwegii^ xPaph. Stonei S • 



Raised by Mr. R. M. Grey for Mr. Graves, Orange, Mass. 

 " The plant resembled the seed-bearing parent very closely." 

 (Hansen, " Orchid Hybrids," p. 189.) 



Zygopetalum x Odontoglossum. 

 (la) Z. Mackayi^ x 0. nobile (Pescatorci) 3 . 



" A few seedlings raised by Mr. Seden for Messrs. J. Veitch 

 & Sons, all of which flowered pure Z. Mackayi." (In litt., 

 September 25, 1897.) 



(lb) The same cross was made by Mr. Treseder at Messrs. 

 Heath & Son, of Cheltenham. " About 300 seedlings were 

 raised, and about twenty plants flowered pure Z. Mackayi." 

 (In litt., September 4, 1897.) 



(2) Z. Mackayi 9x0. crispum $ . 



(3) Z. Mackayi 9x0. grande $ . 



(4) Z. Mackayi 9x0. bictonense $ . 



" A few seedlings of each cross" were raised by Mr. Seden 

 for Messrs. Veitch & Sons. "All of which flowered pure Z. 

 Mackayi." (In litt., September 25, 1897.) 



Zygopetalum x Oncidium. 



{la) Z. Mackayi ? x 0. unquiculalum <? . A plant raised 

 in Florence, Italy, by a friend and correspondent of Mr. Eichel, 

 of Bradford, " has flowered pure and simple Z. Mackayi." 



(lb) Rev. F. D. Horner, of Burton-in-Lonsdale, Kirkby 

 Lonsdale, tells me that he had three seedlings of this same cross, 

 which he grew for four to five years, but they unfortunately died 

 before flowering ; " but the plants seemed the fac-simile of Z. 

 Mackayi in both bulbs and foliage. . . . All experts who saw them 

 called them Z. Mackayi plants." (In litt., September 9, 1897.) 



