100 THE ORCHID REVIEW. [APRIL, 1910 
Dr. Udo Dammer wrote a long note (l.c., p. 34), remarking that the two 
plants under discussion are quite distinct, though expressing the opinion 
that Dr. Goldschmidt’s plant is not the D. aduncum figured in the Botanical 
Magazine (t. 7684). 
Dr. Goldschmidt has since sent me two photographs, one showing his 
entire plant, the other part of a stem with three twin-flowered racemes, and 
they certainly representa species of the D. aduncum group. Three species 
of this group have been described, D. aduncum, Wall., D. hercoglossum, 
Rchb. f., and D. linguella, Rchb. f., but until flowers are available the 
identity of Dr. Goldschmidt’s plant remains uncertain. One thing is clear, 
that it is not at all like Callista amabilis, Lour. I have long known this as 
a species of the D. thyrsiflorum group, but have failed to identify it. The 
flowers are in bad condition, but the short racemes and long narrow bracts 
seem distinct from any known species, and I suspect that until further 
materials are sent from Cochin China, the identity of the plant will remain 
uncertain. The Orchids of Cochin China are still very imperfectly known, 
and an importation from the district whence Loureiro’s plants were 
obtained would be very interesting, and probably yield some novelties. It 
is bordering on Annam, whence so many novelties have recently been 
obtained. 
R. A. ROLFE. 
——, 
DENDROBIUM SIGNATUM. 
WuatT is Dendrobium signatum? A yellow-flowered Dendrobium is in 
cultivation under this name, and has been used for hybridising, but, 
curiously enough, it does not appear to be the plant originally described by 
Reichenbach. A coloured drawing of the latter was made by Mr. Day 
(Orch. Draw., xl. t. 71) on February 16th, 1884, and is accompanied by the 
following note: “‘ Drawn at Mr. Wm. Bull’s, being a new species from Siam of 
his own importation, and flowering now for the first time. The flowers were 
wanted for the Prof., so I could not make any sketch of column, &c. 
Although the flowers recall D. Bensoniz, the growths are more like D. 
tortile, for which Mr. Bull took it on arrival, and sold the entire box at 
Stevens’ for a mere trifle.” It was described by Reichenbach about three 
weeks later (Gard. Chron., 1884, i. p. 306), the author describing it asa good 
deal like D. Bensoniz, and remarking, ‘‘ It is sulphur coloured, with a light 
longitudinal line at the base, on the situation where in some species velvet 
is to be seen. The disc is adorned by a broad transverse radiating brown 
blotch, and on each side of the basal part there are four similar brown lines, 
going out at nearly right angles, and, running, of course, nearly parallel. . . . 
The circumference of the lip may best be compared to that of Dendrobium 
