THE ORCHID REVIEW. 
VoL. XVIII.] MAY, 1g1t0. [No. 209. 
THE EVOLUTION OF THE ORCHIDACE. 
(Continued from page 99.) 
THE subtribe Ccelogynez, using the term in a more restricted sense than 
was done by Bentham, has many points of resemblance to Malaxeze (which 
now includes Liparidee). In fact Bentham remarked :—‘ The distinction 
from Liparidez is not so easily expressed in words.” He also included 
Platyclinis in Liparidez, while Pfitzer has transferred it to Ccelogynee, re- 
uniting it to Blume’s genus Dendrochilum, from which Bentham had 
separated it. Pfitzer limits the subtribe Ccelogynee to Ccelogyne, Pleione, 
Panisea, Otochilus, Pholidota, Dendrochilum, and a few small genera, mostly 
separated from Cocelogyne. The species are epiphytic and pseudobulbous, 
with a spicate or racemose, usually distichous inflorescence, a three-lobed 
spurless lip, and four pollen masses tapering into points or short caudicles, 
and connected after dehiscence by a viscous exudation from the rostellum. 
Ccelogyne is a large and rather polymorphic genus, containing over 70 
species, several of which are popular garden Orchids, and a good many 
others are frequently met with in cultivation. Pholidota is much like a 
reduced form of Coelogyne, characterised by its small flowers, short column, 
and the very concave or saccate base of the lip. Otochilus is also nearly 
allied, but has very narrow sepals and petals, a slender elongated column, 
and a saccate base to the lip. Pleione differs from the others in its 
deciduous habit, differently shaped annual pseudobulbs, the entire, often 
fringed lip, and general floral structure. The species, about ten in 
number, are natives of India and China, and over half of them are known 
in cultivation. Panisea and two or three of Pfitzer’s genera are separated 
from Ccelogyne by very slight characters. Dendrochilum has small, very 
numerous, green, white, or nearly yellow or brownish flowers, which are 
borne in rather crowded distichous spikes, in this respect recalling the small 
section Distichz of Liparis, which is very seldom seen in cultivation. There 
are two distinct sections in the genus, one having elongated climbing stems, 
and distant one-leaved pseudobulbs, the other with very short rhizomes, so 
that the small pseudobulbs appear to be tufted. The former section is 
practically unknown in cultivation ; the latter was separated by Bentham 
123 
