THE ORCHID WORLD. 



[August, 1916. 



and petals, the whitish hp marked with rose- 

 hlac on the broad shoulders and wide apex, 

 while the centre is occupied by a solid rose- 

 lilac blotch, the area surrounding the yellow 

 crest having a varnished appearance. Viewed 

 from the back the central area of the sepals 

 and petals is silvery-white. 



As Wilsonara will include all future com- 

 binations of the three genera Cochlioda, 

 Odontoglossum and Oncidium, many distinct 

 and interesting results are anticipated. 

 Hybrids between Cochlioda and Odonto- 

 glossum are now numerous and well-known, 

 consequently it will be from the Oncidiums 

 that novelties of the future will be derived. 

 Of the Oncidiodas none is finer than O. 

 Cooksoniae (C. Noetzliana x O. macranthum), 

 and when this is combined with some of the 

 finest Odontoglossums many glorious hybrids 

 will surely be produced. 



Although Cochlioda Noetzliana produces 

 beautiful scarlet and red hybrids, there are 

 occasions when the yellow situated in the 

 under part of the flower of this species comes 

 to the surface, and yellowish Odontiodas are 

 produced, notably in varieties of Oda. Joan 

 (Oda. Charlesworthii x 0dm. ardentissimum) 

 and Oda. Madeline (Oda. Charlesworthii x 

 Odm. crispum). If Oncidioda Cooksoniae 

 were crossed with similar Odontoglossums 

 doubtless it would behave in a like manner, 

 perhaps in an even more definite style, seeing 

 that the yellow Oncidium macranthum is also 

 included in the parentage. No doubt the 

 surest method of obtaining large flowered 

 Wilsonaras of yellow colour would be to cross 

 Oncidioda Cooksoniae with one of the 

 yellowish Odontiodas, say, Joan or Madeline. 



Looking still further ahead, there are a few 

 Oncidiums noted for their large floweis of 

 clear and brilliant yellow colour, such as 

 Marshallianum and varicosum, and these, 

 when combined with certain Odontiodas, 

 cannot fail to produce many startling and 

 wonderful hybrids. We are, indeed, in but 

 the infancy of hybridisation, and it will be for 

 the future generations of hybridists to prove 

 that what we are now doing is merely the 

 foundation work of a structure that will never 

 be completed. 



Oncidium concolor. 



ONCIDIUM CONCOLOR. 



i ' 



NOTWITHSTANDING the immense 

 quantities which have from time to 

 time been imported, very little varia- 

 tion in the flowers of Oncidium concolor has 

 been recorded. This is no doubt mainly due 

 to the fact that yellow is very persistent ; even 

 when the purple is removed from a Cattleya 

 the orange-yellow m the throat remains. And 

 so it is with almost all albino Orchids, the 

 yellow is the last colour to be dispelled. 

 However, there are a few notable exceptions, 

 as, for example, m Coelogyne cnstata alba, in 

 which the yellow is entirely eliminated from 

 the throat. Whether a pure white variety of 

 Oncidium concolor will be discovered is 

 perhaps seeking too much, although in the 

 sale of Sir Trevor Lawrence's collection there 

 was a plant of O. concolor described as 

 " spotted on sepals and petals, clear yellow 

 hp," while another, called albens, had the 

 labellum margined with white. 



Mr. Wm. Bolton, of Warrington, has 

 flowered several thousands of O. concolor 

 during the last few years, and his able 

 grower, Mr. W. H. Cain, now informs us that 

 more than 300 were in flower this season, yet 

 out of all this multitude only one variety 

 showing signs of albinism has appeared. A 

 painting of this variety shows a six-flowered 

 raceme, the sepals yellow, the petals white 

 with the median area yellow ; the broad 

 labellum is almost wholly white, but for the 

 yellow crest and a small blotch of this colour 



