THE ORCHID REVIEW. 75 
and serve to show some of the variation to which the species is subject. 
Fig. 11 represents a fairly typical form, out of an importation from Upper 
Burma, from which region a good many of the recent importations are 
believed to have come. 
D.N. ALBIFLORUM (fig: 12) is a rather small form, having the flowers 
pure white, with the exception of the disc, which in very dark, blackish 
maroon in colour. 
D. N. NopiLius (fig. 13) is a well-known varietv, one of the largest 
known, and very richly coloured. It originally appeared about a quarter of 
a century ago. 
D. N. SANDERIANUM (fig. 14) is smaller than the last, but nearly rivals 
it in the colour of the sepals and petals... . 
D. x. Cooxsontanum (fig. 15), is remarkable for having the base of the 
petals coloured very much like the lip, and thus may be considered a 
Peloriate form. It may be mentioned here that D. n. burfordiense has 
somewhat similar markings at the base of the lateral sepals. 
A good many other varieties have been named and described, and a 
Pretty complete account of them was given in the fourth volume of this 
Work (pp. 147-150). We may also add that the beautiful albino D. n. vir- 
ginale, which subsequently appeared, was described and figured at page 145 
of our fifth volume. ; 
ORCHIDS FROM RORAIMA. 
THE last part of the 7ransactions of the Linnean Society is devoted to a 
“Report on two botanical collections made by Messrs. F. V. McConnell 
‘ind J. J. Quelch at Mount Roraima in British Guiana,” the said plants 
having been worked up at Kew. The Orchids are described by Mr. R. A. 
Rolfe, A.L.S., and include the ten following novelties :—Pleurothallis 
Toraimensis, Stelis guianensis, Brachionidium brevicaudatum (an interesting 
addition to a small genus hitherto only known from the Andes and West 
Indies), Octomeria Connellii, O. parvifolia, Bulbophyllum roraimense, 
Houlletia roraimensis, Maxillaria Connellii, M. Quelchii, and Habenaria 
Toraimensis. Orchids seem to occupy an important place in the Roraima 
flora, for it is noted that above an elevation of 5,000 feet, the Order comes 
fst in point of numbers, while in the whole flora it is second only to 
Leguminosz. Messrs. McConnell and Quelch first visited Roraima in the. 
autumn of 1898, and on both occasions, not only encamped higher —e the 
Slopes than any previous traveller, but they spent nights on the summit in 
°rder that the time given to collecting its fauna and flora should be 
‘uninterrupted. 
—— ee 
