140 THE ORCHID REVIEW. [May, 1909. 
antennifera, a striped flower, for which R. maculata often does duty in 
gardens. 
The species of Pleurothallis are not generally attractive, but there are 
exceptions, for P. astrophora, P. Barberiana, and the gnat-like P. 
macroblepharis are little gems when well-flowered. P. ornata is remarkable 
for possessing a row of drooping, white appendages round the margin of the 
sepals, which are so light as to wave about in the slightest breeze. Several 
others, equally small and scarcely less attractive, are occasionally met with, 
while among the larger species must be mentioned P. Roezlii, whose racemes 
of large claret-coloured flowers are decidedly shaeys and the graceful P. 
scapha with some of its allies. 
The species of Cryptophoranthus are very quaint, and unique in having 
the flower closed at the apex, with two small openings at the side, hence the 
term ‘‘ window-bearing Orchids.” The significance of this arrangement is 
still obscure. It is evidently connected in some way with the fertilisation 
of the flower by some particular insect, but Darwin’s remark, ‘‘ Some new 
and curious contrivance has here to be made out,”’ is still true. 
Physosiphon Moorei is a gay little plant when in bloom, and lasts long 
in perfection. The flowers of Stelis are remarkable for opening and shutting 
at various times of the day, and a few species are graceful and attractive. 
Thus it will be seen that the subtribe Pleurothallez, to which the foregoing 
all belong, is by no means devoid of interest. We may now pass to the 
Oncidiez. 
Odontoglossum is the typical genus of Cool House Orchids, yet several 
species which are not generally grown should find a place in a representative 
collection. And there are several species of Oncidium from similar 
altitudes which make a welcome variation, being distinct in appearance and 
_ colour. Several allied genera contain very interesting species which are 
suitable for suspending from the roof of this structure, but with a few 
exceptions they are rather difficult to obtain at the present time. 
(To be continued.) 
CIRRHOPETALUM BRIENIANUM. 
TuIs singular species has again appeared, a plant received from the 
Brussels Botanic Garden over a year ago, with other Malayan species, 
having now flowered at Kew, and proves to be identical with the original, 
which was introduced from Borneo, by Messrs. Linden, in 1891, and after- 
wards described (Rolfe in Kew Bull., 1893, p. 62). Ridley afterwards 
reduced it to a variety of C. Makoyanum, Rchb. f. (Bot. Mag., t. 7259), and 
states that it inhabits the Malayan Peninsula as well as Borneo, but as a 
specimen sent by him as C. Makoyanum is typical C. Brienianum the 
