200 THE ORCHID REVIEW. [JULY, 1903. 
A comparison of these figures with those of C. Dayanum and C. virens, 
and of authentic dried flowers of all the four kinds, comfirms me in the 
opinion that the two former are natural hybrids between the other two. It 
soon became known that all were natives of Borneo, and Messrs. Veitch 
state that Mr. Peter Veitch and Mr. Burbidge also collected C. Dayanum, 
the locality being at the foot of the Marie-Parie Spur of Mt. Kina Balu 
(Veitch Man. Orch., iv., p. 21). They indeed consider C. Petri and C. 
Burbidgei as synonymous with C. Dayanum, but this is certainly not 
correct. There is a published figure purporting to be C. Petri (Gard. 
Chron., 1887, i., p. 577, fig. 110), but in my opinion it is C. Dayanum. It 
was taken from a plant in Mr. Tautz’s collection, and is certainly neither 
the one represented by Mr. Day nor that grown by Messrs. Veitch. The 
locality, ‘‘ Java,” mentioned by Mr. Day under C. Burbidgei, I strongly 
suspect to be a mistake. C. Dayanum is well known to be very pale in 
colour, the petals comparatively long, and the dorsal sepa! with very long 
cilia. C.virens has a smaller green flower, with the apical halves of the 
petals reddish purple. Mr. Day’s drawing of C. Petri is about intermediate 
in every respect, while that of C. Burbidgei is rather nearer to C. virens in 
size and shape. Dried flowers of the two forms are equally intermediate in 
character and less diverse from each other than the forms figured by Mr. 
Day, which, however, are almost identical in the colour and markings of the 
leaves. The two forms are extremely rare, and the facts pointed out, taken 
in connection with our knowledge that the suggested parents grow inter- 
mixed, fully warrant the conclusion that they are forms of a natural hybrid 
between the two species suggested, and it is unfortunate that flowers of C. 
X woodlandense are not yet available for comparison. In order to test the 
question the two species have been again crossed together, and a capsule of 
apparently good seed was produced, but it failed to germinate. It is to be 
hoped that someone else will attempt the cross and let us know the result. 
R. A. RoLFE. 
BULBOPHYLLUM ERYTHROSTACHYUM.—A species omitted from my 
note on “Bulbophyllum clavatum and its allies,” at page 190, is B. 
erythrostachyum (Rolfe), which has been cultivated at Glasnevin for 
some considerable time. It is a native of Madagascar, and is allied to 
B. clavatum (Thouars Orch. Iles Afr., t. 99), but differs in having 
monophyllous pseudobulbs, a broader leaf, and the rachis as much as five 
lines broad, and of a uniform lurid purple red from base to apex. The 
flowers are scattered, and light green, with three dull purple stripes on the 
dorsal sepal. The leaves and inflorescence are about six inches high. The 
colour of the inflorescence gives it a rather striking appearance. 
R. A. ROLFE. 
