202 THE ORCHID REVIEW. 
It is, however, only in the Bogota district, where its area overlaps that of 
O. crispum, that this particular hybrid occurs. In fact, almost every plant 
now in cultivation has flowered quite unexpectedly among ap of | 
the latter. 
The appearance of this hybrid dates from 1872, when a very beautifull 
Odontoglossum flowered in Lord Londesborough’s collection, and was 
named O. Denisoniz, in compliment to Lady Londesborough. It was 
awarded a First-class Certificate by the Royal Horticultural Society on 
January 17th of that year. It is recorded that it was at first thought to be 
a white variety of O. luteopurpureum. It bore a branched inflorescence 
with nineteen flowers, the ground colour white, with a few light brown 
spots on the sepals and petals, and the disc of the lip lemon-yellow. Mr. 
Denning, the gardener, afterwards stated that it flowered in an importation 
of O. crispum made by Messrs. Backhouse, of York, three years before, and 
was secured by Lord Londesborough. Mr. Denning considered it to bea 
natural hybrid between O. luteopurpureum or QO. hystrix (a variety of the 
same) and O. crispum, because the branching inflorescence, the long taper- 
ing sepals and petals, the strong growth and the general contour of the 
plant and flowers, all bore a considerable resemblance to the former, while 
the colour was almost bu of the latter. The coloured plate quite confirms 
this opinion. | 
Its next appearance was in 1880, in the collection of M. Massange de 
Louvrex, of Baillonville, near Marche, Belgium. Some plants of O. crispum, 
_imported in 1878 by Messrs. Hugh Low and Co., af Clapton, passed into 
this collection, and one on flowering proved to be quite distinct, and was 
therefore sent to Prof. Reichenbach, who named it O. x Wilckeanum, in 
honour of M. Massange’s gardener, and at the same time indicated its hybrid 
origin and parentage. This had the sepals and petals of the lightest whitish 
yellow, blotched with brown, and the lip much like that of O. crispum, but 
with some brown blotches, and an approach to QO. luteopurpureum in the 
crest. 
A second plant soon afterwards flowered’in the same collection; then it 
appeared successively with Mr. Calvert, of Wood Green, near London, 
William Lee, Esq., of Leatherhead, and the Right Hon. J. Chamberlain, of 
Highbury, near Birmingham. Mr. Lee’s plant was called variety varians, 
on account of its nearly white ground colour. Many other varieties have 
since appeared, some of which. have received distinctive varietal names, 
while a few have been described as distinct. ‘These we may now consider. 
In 1882 a plant was figured in the Gardeners’ Chronicle as Odontoglossum 
x lyroglossum, Rchb. f., but it does not represent the true plant of that 
name, as we shall hereafter see. It flowered in the collection of William 
Lee, Esq., of Leatherhead. -The flowers are bright--yellow with chestnut- 
brown blotches, and have more of the luteopurpureum. character than usual. 
