THE ORCHID REVIEW. 261 
are very nice, and come very near those of O. cordatum. The rhachis of 
the inflorescence is very much thinner, only two-flowered, and the bracts 
very short, one fourth the length of the stalked ovary, whitish green, not 
yellowish straw-colour. Sepals shorter, straight or nearly so, yellow at 
their ends, with cinnamon bars. Petals white, with a few (three) sepia- 
brown blotches at their base. Lip white, without brown blotches, not 
acuminate, with a yellow callus striped inside with red, and narrowed at its 
apex, in the way of O. Rossii. The leaf shows the peculiar venation of 
O. cordatum and maculatum.” 
I have not seen a flower of Mr. Hume’s original plant, but I am 
inclined to think that O. maculatum, not O. cordatum, was the second 
parent. A plant considered to be the same, from the collection of John 
Riley, Esq., Hapton House, Burnley, was afterwards figured in Reichenbachia, 
when it was remarked :—‘‘O. X Humeanum is universally considered to be 
a natural hybrid between O. Rossii and O. cordatum, but a comparison of 
the shape and structure of the flowers leads us to think that there is less of 
O. cordatum and more of O. maculatum in it, the characters of the latter 
being also observable in habit of growth.” This remark would apply equally 
well to all the forms which I have seen, and it may be added that the narrow, 
acuminate, sepal-like petals of O. cordatum are notably different. Messrs. 
Veitch, however, who reduce O. X Humeanum toa variety of O. Rossii, — 
speak of it as of ‘‘ supposed hybrid origin, deriving its cordate lip and 
cinnamon-red spots from O. cordatum,” adding, ‘“‘the O. x Humeanum of 
some collections is not this, but a slight deviation from aspersum.” 
O. X aspersum was described by Reichenbach in 1879, as follows :— 
“No doubt this is a new hybrid, the third one (after Humeanum and 
vexativum) in this affinity, standing between Odontoglossum maculatum 
and Rossii. It has bulbs much like those of O. maculatum, but smaller, 
while the flowers are thinner in texture and as large only as those of a small 
QO. maculatum. The bracts are broadand short ; the sepals whitish yellow, 
mottled inside with numerous brown blotches, and keeled on the back of 
the middle vein. The petals are of the same colour, but much broader, and 
with afew brown spots at the base. The lip is wholly whitish, and the 
callus at the base yellow, with brown lines. The column is green at the 
base, white above ; the border of the stigmatic hollow rose-coloured. The 
short, broad bracts and the short sepals exclude the idea of O. cordatum 
(so much resembling those of O. X Humeanum). The white lip and the 
blotches of the sepals belong to O. Rossii. . . . For this very curious 
novelty I have to thank Messrs. Veitch, who sent full materials.” 
Odontoglossum xX Youngii was described, in 1889, by the late Mr. 
Gower, and figured in the Orchid Album, as a new and distinct species from 
the collection of Reginald Young, Esq., Linnet Lane, Liverpool. It was 
